The benefit of internal data is that internal data is more reliable and easier to collect.
Internal data are unique facts and figures that originate directly from the systems of the business in the issue. Internal data is rarely accessible to or studyable by outside parties without the express consent of the corporate entity.
The success of the company's present processes can be seen through internal data. Internal data, which is gathered from sources like website KPIs and customer surveys, is a priceless resource for assessing company policies, goods and branding, and worker efficiency.
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104°
X what does that equal if it’s a vertical angel?
Answer:If 104° is a measure of one of the vertical angles formed by the intersection of two straight lines, then the measure of the other vertical angle would also be 104°. This is because vertical angles are always congruent, which means they have the same measure.
Step-by-step explanation:
Which expression is the simplest form of 4(3x + y) + 2(x-5y) +x2?
Answer:
Step-by-step explanation:4(3x+y)+2(x-5y)+x²=12x+4y+2x-10y+x²
=14x-6y+x²
=x²+14x-6y
The water level in a swimming pool increased from 3.5 feet to 7 feet. What is the percent increase in the water level?
(6) / (4.5) = 4 / 3 = 1.333...
The level increased by 33-1/3 % .
The old level was 75% of the new level.
The amount of water in the pool also had to
increase 33-1/3 % . If you didn't have that
much water to put in the pool, you couldn't
change the surface level from 4.5ft to 6ft .
finding the final amount in a word problem on compound...
When $2,000 is loaned for 5 years at 15% interest compounded monthly, the final amount (or future value) is $4,214.36.
How is the final amount determined?The final amount is the future value of the present value investment.
The future value can be computed using the FV formula or an online finance calculator as follows:
N (# of periods) = 60 months (5 years x 12)
I/Y (Interest per year) = 15%
PV (Present Value) = $2,000
PMT (Periodic Payment) = $0
Results:
Future Value (Final amount)) $4,214.36
Total Interest = $2,214.36
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The diagram is a plane figure with five sides. From one vertex a line was drawn to the non-consecutive vertices. What is the sum of the interior angles of the polygon?
The sum of the interior angles of the polygon is 540° by the Sum of angles property of pentagon.
We know that the diagram is a plane figure with five sides, which means it is a Pentagon (Five-sided polygon), when from one vertex a line was drawn to the non-consecutive vertices, we need to find the sum of the interior angles of the polygon:
The total of interior angles in a polygon can be found by multiplying the quantity of triangles by 180°. It is noticeable that the number of triangles is consistently two less than the number of sides.
As a result, we can conclude that the formula for determining the sum of interior angles in a convex polygon with n sides is:
S = (n - 2) × 180°
This formula provides the sum of interior angles for any polygon.
Solution: A pentagon has five sides.
Therefore, by the angle sum formula we know that:
S = (n − 2) × 180°
Here we know that n = 5 as pentagon has 5 sides,
Hence, by the Sum of angles of pentagon = (5 − 2) × 180°
S = 3 × 180°
S = 540°
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Answer:
540°
Step-by-step explanation:
Starting from a full tank, can Matthew's family drive the car for 25 days
without the warning light coming on? Explain or show your reasoning.
.
Matthew's family cannot drive for 25 days without the warning light coming on, and they will need to refill the tank before that point.
When will the warning light come on?If the car uses 0.6 gallons of fuel per day, then in 25 days, it will use:
= 0.6 gallons/day × 25 days
= 15 gallons
This means that if Matthew's family starts with a full tank of 14 gallons, they will not be able to drive for 25 days without running out of fuel.
The question asks if they can drive for 25 days without the warning light coming on. If the warning light comes on when there is 1.5 gallons or less of fuel remaining, then Matthew's family can drive for:
= 14 gallons - 1.5 gallons
= 12.5 gallons before the warning light comes on.
Since they use 0.6 gallons of fuel per day, they can drive for:
= 12.5 gallons / 0.6 gallons/day
≈ 20.8 days without the warning light coming on.
Therefore, they cannot drive for 25 days without the warning light coming on, and they will need to refill the tank before that point.
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A bag contains tiles that are the same size and shape.
4 green tiles
.
D
• 5 yellow tiles
-
6 blue tiles
Will randomly selects a tile from the bag, replaces it, and then randomly selects a second tile.
Joan randomly selects a tile from the bag, does not replace it, and then randomly selects a second tile.
Who has the greatest probability of selecting a blue tile and then a yellow tile?
Will is therefore more likely to choose a blue tile before choosing a yellow tile.
what is probability ?The likelihood or possibility of an event happening is measured by probability. It is represented by a number in 0 and 1, with 0 denoting an impossibility and 1 denoting a certainty. By dividing total number of favourable possibilities by the total number of potential outcomes, one can determine the probability of an occurring. In other respects, it is the proportion between the amount of alternative outcomes to the number of possible ways the event could happen. In many fields, including statistics, mathematics, physics, economics, and the social sciences, probability is used to create predictions and well-informed judgements based on the likelihood that events will occur.
given
We must take into account the likelihood of each event and then combine them together in order to get the probability of choosing a blue tile first, followed by a yellow tile.
Will picks blue first, then yellow, therefore P(Will) = (6/15) * (5/15) = 2/15
The likelihood that Joan will first choose a blue tile is the same as before: 6/15.
Joan picking a yellow tile on her second pick thus has a 5/14 chance of doing so. Hence, the likelihood that Joan will choose a blue tile first, followed by a yellow tile, is:
P(Joan chooses yellow first, then blue) = (6/15) * (5/14) = 3/35
Will is therefore more likely to choose a blue tile before choosing a yellow tile.
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Mrs. Hernandez’s class sold fruit pies for $5 each and Mr. Kane’s class sold bottles of fruit juice for $2 each. Together, the classes sold 29 items and earned $94 for their school. Write and solve a system of equations that models this problem. SHOW ALL YOUR WORK! Mrs. Hernandez's class sold fruit pies and Mr. Kane's class sold bottles of fruit juice.
Mrs. Hernandez's section has sold 12 fruit pies and Mr. Kane's class had sold 17 bottles of fruit juice.
Let's use the variables 'x' and 'y' to represent the number of fruit pies sold by Mrs. Hernandez's class and the number of bottles of fruit juice sold by Mr. Kane's class, respectively.
From the problem, we know that:
Each fruit pie sold for $5, so the revenue from Mrs. Hernandez's class is 5x.
Each bottle of fruit juice sold for $2, so the revenue from Mr. Kane's class is 2y.
The total number of items sold is 29, so x + y = 29.
The total revenue earned is $94, so 5x + 2y = 94.
Our system of equations is:
x + y = 29
5x + 2y = 94
To solve the system, we can use the substitution method. Solving the first equation for y, we get:
y = 29 - x
Substituting this expression for y into the second equation, we get:
5x + 2(29 - x) = 94
Simplifying and solving for x, we get:
3x = 36
x = 12
Substituting x = 12 into the equation y = 29 - x, we get:
y = 29 - 12 = 17
Therefore, it can be concluded that Mrs. Hernandez's class sold 12 fruit pies and Mr. Kane's class sold 17 bottles of fruit juice.
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a random variable is uniformly distributed between 12 and 41. what is the probability that is between 22 and 35? give your answer as a percent, rounded to one decimal place. for example if the probability is 0.501, your answer should be 50.1.
The probability that a uniformly distributed random variable between 12 and 41 is between 22 and 35 is 41.7%.
Since the random variable is uniformly distributed between 12 and 41, the probability density function (PDF) of the random variable is constant within that interval and zero outside of it. Let X be the random variable between 12 and 41. Then,
f(x) = 1/(41-12) = 1/29, for 12 ≤ x ≤ 41
The probability that the random variable is between 22 and 35 can be found by integrating the PDF over the interval [22, 35]:
P(22 ≤ X ≤ 35) = ∫(22 to 35) f(x) dx = ∫(22 to 35) 1/29 dx
Using the definite integral, we get:
P(22 ≤ X ≤ 35) = [x/29] from 22 to 35
P(22 ≤ X ≤ 35) = (35/29 - 22/29) = 13/29
So, the probability that the random variable is between 22 and 35 is 13/29, which is approximately 0.4483 or 44.8% when expressed as a percentage rounded to one decimal place.
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please help me with this !!
Step-by-step explanation:
This is an ordinary annuity type of question :
FV = C [ ((1+i)^n) -1 )/i ] plug in the numbers
FV = 25 000 [ (1+.08)^9 -1 ]/ .08 = ~ $ 312 189
At arcade palace, a child can buy 16 video game tokens for $4. At Alibaba's,
At Arcade Palace, each video game token costs 0.25.
At Arcade Palace, a child can buy 16 video game tokens for 4.
The total number or cost of something is the number or cost that you get when you add together or count all the parts
in it.
A number is a mathematical value used for counting or measuring or labeling objects. Numbers are used to performing
arithmetic calculations.
To find the cost per token, follow these steps:
Determine the total number of tokens (16) and the total cost (4).
Divide the total cost by the total number of tokens to find the cost per token.
In this case, 4 ÷ 16 tokens = 0.25 per token.
Therefore, at Arcade Palace, each video game token costs 0.25.
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What is a formula for the nth term of the given sequence? 13,15,17…
Answer: [tex]a_n = 2n+11[/tex]
======================================
Explanation:
The gap between adjacent terms is 2.
15-13 = 217-15 = 2We add 2 to each term to get the next. Therefore, d = 2 is the common difference.
The first term is [tex]a_1 = 13[/tex]
Use that and the value of d to determine the nth term formula of this arithmetic sequence.
[tex]a_n = a_1 + d(n-1)\\\\a_n = 13 + 2(n-1)\\\\a_n = 13 + 2n-2\\\\a_n = 2n+11 \textbf{ is the final answer}\\\\[/tex]
---------------
Check:
Plug in n = 1
[tex]a_n = 2n+11\\\\a_1 = 2*1+11\\\\a_1 = 2+11\\\\a_1 = 13\\\\[/tex]
That confirms 13 being the 1st term.
Now use n = 2
[tex]a_n = 2n+11\\\\a_2 = 2*2+11\\\\a_2 = 4+11\\\\a_2 = 15\\\\[/tex]
That matches with the fact 15 is the 2nd term.
I'll let you check the third term.
Need help finding the missing coefficient
Answer:
- 40
Hope this helps!
Step-by-step explanation:
( 4d - 6 )( 4d - 4 ) : Cross Multiply
( 4d × 4d ) + ( 4d × (-4)) + ((-6) × 4d ) + ((-6) × (-4))
[tex]16d^{2}[/tex] - 16d - 24d + 24 : ( Combine like terms )
[tex]16d^{2}[/tex] - 40d + 24
A car's cruise control function should keep the car within 2.5 mph of the set speed. Shala sets her cruise control for 65 mph. A. create a compound inequality to represent the speed Shala's car should go and graph the inequality on the number line. B. Shala is driving on a road with a speed limit of 60 mph. It is possible for her to get a ticket if she goes more than 7mph over the speed limit. is it possible for Shala to get a ticket while she is on cruise control.
Part A: compound inequality for the speed Shala's car: | x - 65 | ≤ 2.5
Part B: 67 mph < 67.5 (maximum value) Thus, she will not get the ticket.
Explain about the compound inequality:Two or more inequalities are connected together with or or and to form a compound inequality (also described as a combined inequality). A value must only make one aspect of an inequality true in order to be the solution to an or inequality. An inequality's solution must make both portions true in order to succeed.
Speed limit set by car's cruise control function = 2.5 mph.
Speed limit set by Shala = 65 mph.
Thus,
Maximum speed of car = 65 + 2.5
Minimum speed of car = 65 - 2.5
Let x represents the current speed of car,
x ≤ 65 + 2.5 or x ≥ 65 - 2.5
x - 65 ≤ 2.5 or x - 65 ≥ - 2.5
x - 65 ≤ 2.5 or - (x-65) ≤ 2.5
| x - 65 | ≤ 2.5 ( required compound inequality)
Now,
65 - 2.5 ≤ x ≤ 65 + 2.5
62.5 ≤ x ≤ 67.5
In interval notation; [62.5, 67.5]
The inequality on the number is drawn.
If Shala goes with 7 mph over the speed limit.
60 + 7 = 67 mph < 67.5 (maximum value)
Thus, she will not get the ticket.
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PLESEEE I NEEDDD HELPP OR ILL FAIL PLEASEEE!!
Thus, the measure of the minor arc CG for the given chord for the circle is found as: arc CG = 30°.
Explain about the minor arc:The shortest arc that connects two points on a circle is called a minor arc.
A minor arc's measure is equal to the angle's central measure and is less than 180 degrees.The longer arc that joins two circle ends is known as a major arc.A major arc's measure is greater than 180 degrees and equal to 360 degrees less the diameter of a small arc with the same ends.A semicircle is an arc that is exactly 180 degrees in length.For the given figure:
Using the intersecting chord theorem:
m∠FED = 1/2(arc CG - arcFD)
39 = 1/2(arc CG - 48)
arc CG - 48 = 39*2
arc CG = 78 - 48
arc CG = 30°
Thus, the measure of the minor arc CG for the given chord for the circle is found as: arc CG = 30°.
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Complete question:
Find the measure of minor arc CG for the attached figure.
A bag has 3 red marbles, 2 blue, 4 green and 1 yellow. What is the theoretical probability of pulling a red marble without replacement? Write your answer as a fraction, decimal, and percent.
Answer:
1/15 or approximately 0.067 or 6.7%.
Step-by-step explanation:
The total number of marbles in the bag is 3+2+4+1=10.
The probability of pulling a red marble on the first draw is 3/10, since there are 3 red marbles out of 10 total marbles.
Since we are not replacing the marble after each draw, the probability of pulling another red marble on the second draw decreases slightly. After one red marble has been drawn, there are only 2 red marbles left out of 9 total marbles. So the probability of pulling a second red marble is 2/9.
Therefore, the theoretical probability of pulling two red marbles without replacement is:
P(Red, Red) = P(Red on first draw) x P(Red on second draw, given that the first marble was red)
= 3/10 x 2/9
= 1/15
So the theoretical probability of pulling a red marble without replacement is 1/15 or approximately 0.067 or 6.7%.
The value of the theoretical probability of pulling a red marble without replacement is,
= 3/10
= 0.3
= 30%
What is mean by Probability?The term probability refers to the likelihood of an event occurring. Probability means possibility. It is a branch of mathematics that deals with the occurrence of a random event. The value is expressed from zero to one.
Given that;
A bag has 3 red marbles, 2 blue, 4 green and 1 yellow.
Hence, Total marbles = 3 + 2 + 4 + 1 = 10
Thus, The value of the theoretical probability of pulling a red marble without replacement is,
P = Desired Outcomes / Total number of outcomes.
P = 3 / 10
P = 0.3
P = 30%
Thus, The value of the theoretical probability of pulling a red marble without replacement is,
= 3/10
= 0.3
= 30%
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What is the mean in the set of data below:
Data: 2.25, 4.5, 3.75, 1.5, 5.25 (hint: do not round your answer)
Answer: 3.45
Step-by-step explanation:
Answer:
aswer will be 11.25 hope this helps
what is the area of triangle ABC
A 6√3
B 18√3
C 36√3
D 72√3
Answer:
B 18√3
Step-by-step explanation: 1. Calculate the base and height of the triangle.
2. Multiply the base and height of the triangle.
3. Divide the result by 2.
4. Multiply the result by the square root of 3.
5. The answer is 18√3.
There are 28 more butterflies than snails. There are 9 snails. How many butterflies are there?
Answer:
Step-by-step explanation:
Step 1:
Butterflies is greater than Snails
More=addition
GP: 28+9=B
Step 2:
28+2=30
30+7=37
Answer: 37 Butterflies
Hope this helps!
Given that,
Total butterflies = 28
Total snails = 9
More butterflies than snails are = butterflies + snails
[tex]\implies28+9[/tex]
[tex]\implies 37[/tex]
Therefore, there are 37 butterflies.
Fast for 100 points
One interior angle of a triangle is 35°, and the other two angles are congruent. Choose the equation that could be used to determine the degree measure of one of the congruent angles.
2x + 35 = 180
2x − 35 = 90
x + 35 = 180
x − 35 = 90
2x + 35 = 180 is the correct equation that could be used to determine the degree measure of one of the congruent angles.
What are congruent angles?
Congruent angles are angles that have the same measure. Two angles are said to be congruent if they have the same degree measurement.
2x + 35 = 180 can be used to determine the degree measure of one of the congruent angles.
Let x be the degree measure of each of the two congruent angles.
Then, the sum of the interior angles of a triangle is 180 degrees, so we can set up the equation:
35 + x + x = 180
Simplifying and solving for x, we get:
2x + 35 = 180
Therefore, 2x + 35 = 180 is the correct equation that could be used to determine the degree measure of one of the congruent angles.
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Answer:
2x + 35 = 180 is the correct equation that could be used to determine the degree measure of one of the congruent angles.
Step-by-step explanation:
working on notes right now also the other guy is error free.
fifty (50) soc390 students from the spring scored an average of 80 on exam 1, with a standard deviation of 12. fifty-two (52) soc 390 students from the fall scored an average of 81 on exam 1, with a standard deviation of 6. what can we conclude?
There is no significant difference in the average scores of two groups of SOC 390 students who took Exam 1 in the spring and fall semesters, respectively, as per the two-sample t-test with a p-value of 0.388.
The average score of the spring group of 50 students in SOC 390 on Exam 1 was 80, with a standard deviation of 12, while the average score of the fall group of 52 students was 81, with a standard deviation of 6. To determine if the difference in the means of the two groups is statistically significant, we can use a two-sample t-test.
Assuming unequal variances, the t-value for the two groups is 0.87, with a corresponding p-value of 0.388. Since the p-value is greater than the standard alpha level of 0.05, we fail to reject the null hypothesis that the two groups have equal means.
Therefore, we can conclude that there is no significant difference in the average scores of the two groups of SOC 390 students who took Exam 1 in the spring and fall semesters, respectively.
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The complete question is :
What is the difference between the average scores of two groups of students who took Exam 1 in SOC 390 in the spring and fall semesters, respectively, given that the spring group consisted of 50 students who scored an average of 80 with a standard deviation of 12, and the fall group consisted of 52 students who scored an average of 81 with a standard deviation of 6?
I need help with this question
The equilateral triangle ABC have the value for x as 4√3, the measure of angle B is equal to 60° and the area is derived to be equal to 16√3.
How to evaluate for the required values of the equilateral triangle ABCAn equilateral triangle have all its sides and angle to be equal, and each interior angles is equal to 60°
using the trigonometric ratio of sin for the angle C;
recall sin 60° = √3/2
sin 60° = x/8 {opposite/hypotenuse}
√3/2 = x/8
x = 4√3 {cross multiplication}
angle B = 60° {one interior angle of an equilateral triangle}
area of triangle = 1/2 × base × height
area of triangle ABC = 1/2 × 8 × 4√3
area of triangle ABC = 16√3.
Therefore, the equilateral triangle ABC have the value for x as 4√3, the measure of angle B is equal to 60° and the area is derived to be equal to 16√3.
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The citizens of a city were asked to choose their favorite pet. The circle graph shows how the citizens answered. If 95,000 citizens answered the question, how many chose Snakes or Dogs?
First, we need to calculate the percentage of citizens who chose either Snakes or Dogs.
The percentage of citizens who chose Dogs is 26%, which is equivalent to 0.26 as a decimal.
The percentage of citizens who chose Snakes is 10%, which is equivalent to 0.10 as a decimal.
To find the number of citizens who chose either Snakes or Dogs, we need to multiply the total number of citizens by the combined percentage of Snakes and Dogs:
0.26 + 0.10 = 0.36
So the combined percentage of Snakes and Dogs is 36%.
To find the number of citizens who chose Snakes or Dogs, we can multiply the total number of citizens by this percentage:
0.36 x 95,000 = 34,200
Find the value of x.
please answer
Answer:
x =107+88 =195, 360 -195 =165
Answer:
73°
Step-by-step explanation:
In an inscribed quadrilateral opposite angles are supplementary( they add up to 180) so angle x and its opposite angle( which is 107°) are equal to 180.
x + 107 = 180
Subtract 107 from both sides to isolate the x
x = 73
Find the area of the triangle.
5 km
143°
7 km
The area of the triangle is approximately 11.524 km²
What is an area?
We can find the area of the triangle using the formula:
Area = (1/2) * a * b * sin(C)
where a and b are the lengths of the two sides and C is the angle between them.
In this case, a = 5 km, b = 7 km, and C = 143°. However, before we can use this formula, we need to convert the angle to radians. We can do this by multiplying by pi/180:
C = 143 * pi/180
C ≈ 2.495 radians
Now we can substitute the values into the formula and calculate the area:
Area = (1/2) * 5 km * 7 km * sin(2.495)
Area ≈ 11.524 km²
Therefore, the area of the triangle is approximately 11.524 km².
What is triangle?
A triangle is a 2-dimensional geometric shape that has three sides and three angles. It is one of the basic shapes in geometry and is used in various fields such as mathematics, engineering, architecture, and art. Triangles can be classified into different types based on their sides and angles, such as equilateral, isosceles, scalene, acute, right, and obtuse triangles. The area of a triangle is calculated by using the formula A = 1/2 * base * height, where the base is the length of one of its sides and the height is the perpendicular distance between the base and the opposite vertex.
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Complete question is: The area of the triangle is approximately 11.524 km²
how many integers between 100 and 999, inclusive, have the property that some permutation of its digits is a multiple of 11 between 100 and 999? for example, both 121 and 211 have this property. (2017amc10a problem 25)
226 integers are present between 100 and 999, inclusive, and have the property that some permutation of its digits is a multiple of 11 between 100 and 999.
Here, we have,
The problem statement is to find the number of multiples of 11 between 100 and 999 inclusive, where some multiples may have digits repeated twice and some may not.
To solve this problem, we can first count the number of multiples of 11 between 100 and 999 inclusive, which is 81.
Some of these multiples may have digits repeated twice, and each of these can be arranged in 3 permutations.
Other multiples of 11 have no repeated digits, and each of these can be arranged in 6 permutations.
However, we must account for the fact that switching the hundreds and units digits of these multiples also yields a multiple of 11, so we must divide by 2, giving us 3 permutations for each of these multiples.
Thus, we have a total of 81 × 3 = 243 permutations.
However, we have overcounted because some multiples of 11 have 0 as a digit.
Since 0 cannot be the digit of the hundreds place, we must subtract a permutation for each of these multiples.
There are 9 such multiples (110, 220, 330, ..., 990), yielding 9 extra permutations.
Additionally, there are 8 multiples (209, 308, 407, ..., 902) that also have 0 as a digit, yielding 8 more permutations.
Therefore, we must subtract these 17 extra permutations from the total of 243, giving us 226 permutations in total.
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a technical engineer is interested in understanding the battery life of two different laptops for student usage at a community college in california. the two models he has are madroid and krapple. he randomly assigned students to one of the laptop models and recorded the number of minutes the students were able to use the computer until the battery ran out. use data file: laptops.csv download laptops.csv does the technical engineer have statistically significant evidence to present to the university budget committee to purchase krapple because it has, on average, a longer battery life? provide the p-value from your analysis.
The conclusion of hypothesis testing through the t-test is that the technical engineer have not statistically significant evidence to present to the university budget committee to purchase Krapple because it has, on average, a longer battery life. The p-value for t-test is equals to the 0.0074.
We have study related to battery life of two different laptops for student usage at a community college in california. There are two models, Krapple and Madroid. Engineer randomly assigned students to one of the laptop models and recorded the number of minutes the students were able to use the computer until the battery ran out. Here we have paired data so paired t test should be used.
Let d = Krapple - Madroid ( Sample sum of difference). Above table shows the calculations, Sample size, n = 15
Sample sum of difference, d = 1243
Sample mean of differences: Σα
= 1243/15 = 82.87
Sample standard deviation = [tex]\sqrt{\frac{488317.73}{15-1}}[/tex]
= 186.76
The Null and alternative Hypotheses are defined as [tex]H_0 : \mu_1- \mu_2 = 0[/tex]
[tex]H_a : \mu_1 - \mu_2 < 0[/tex]
Level of significance, α = 0.05
Test is one tailed (right tailed) df = n- 1
=> Degree of freedom = 14
Using the t - test, [tex]t = \frac{\sum d }{ \sqrt{\frac{n\sum d² - (\sum d)²}{n - 1}}}[/tex]
so, [tex] t = \frac{ 1243}{\sqrt{\frac{15× 488317.73 - (1243)²}{ 15 -1}}}[/tex]
=> [tex]t =\frac{1243}{\sqrt{412836.925}}[/tex]
=> t = 1.93
Now, using distribution table, P- value for t = 1.93, is 0.074. See, p-value > 0.05 , so result is not statistically significant. So, there is no evidence to reject the null hypothesis.
Conclusion: The technical engineer do not have statistically significant evidence to present to the university budget committee to purchase Krapple because it has, on average, a longer battery life.
Hence, required p-value is 0.074.
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Complete question:
the above first figure complete the question.
a technical engineer is interested in understanding the battery life of two different laptops for student usage at a community college in california. the two models he has are madroid and krapple. he randomly assigned students to one of the laptop models and recorded the number of minutes the students were able to use the computer until the battery ran out. use data file: laptops.csv download laptops.csv does the technical engineer have statistically significant evidence to present to the university budget committee to purchase krapple because it has, on average, a longer battery life? provide the p-value from your analysis.
Solve the inequality: 0.5k < 18.5
A k <9.25
B k> 9.25
C k < 37
D k> 37
a scientist claims that 6% of viruses are airborne. if the scientist is accurate, what is the probability that the proportion of airborne viruses in a sample of 403 viruses would differ from the population proportion by greater than 3% ? round your answer to four decimal places.
The probability that the proportion of airborne virus in the sample of 553 viruses is greater than 5% is 0.1151.
According to the central limit theorem, if a large sample of n > 30 is selected from an unknown population and the sample proportion of each sample is calculated, the sampling distribution of the sample proportion obeys the normal distribution.
The mean of the sampling distribution (U) for this sample proportion is:
U = p
The standard deviation (p) of the sampling distribution for this sample proportion is:
U = √ ((p(1 - p)) /n )
The sample size is, n = 553 > 30 so the central limit theorem applies in this case.
Up = √((p(1 - p))/n) = √((0.04 * 0.96)/553) = 0.0083
Calculate the probability that the proportion of virus in the air in 553 virus samples is greater than 3% as follows:
P(p >0.03)
= P (p - Up > (0.
= 0.11507
≈ ≈ 0.1151
Therefore, the probability that the proportion of airborne virus in a sample of 553 viruses is greater than 3% is 0.1151.
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charlie's teacher claims that he does not study and just guesses on exams. on an exam with 201 true-falsequestions, charlie answered 53.7% of the questions correctly. calculations using these results show that if hewere really just guessing, there would be roughly 1 chance in 7 that he would do this well. is there statisticallysignificant evidence against the teacher's claim that charlie is just guessing? why or why not?4
There is No statisti-cally signi-ficant evidence against the teacher's-claim that Charlie is just guessing because the probability is very low.
The total number of True-false questions are = n = 201.
The probability of getting a correct answer by guessing is = p = 0.5,
Charlie answered 53.7% = 0.537 of the questions correctly,
So, P(p' ≥ 0.537)
⇒ P(z ≥ (0.537 - 0.5)/√(0.5×0.5)/201,
⇒ P(z ≥ 1.05) = 1 - P(z < 1.05)
⇒ 0.1469
Since, the probability is very low,
Therefore, there is not any significant evidence against the teachers claim.
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