Answer:
Kindly check explanation
Step-by-step explanation:
New Method : 81 80 79 81 76
Standard Method Score: 69 68 71 68 73 72
H0 : μn = μa
H0 : μn < μa
New Method :
Using a calculator :
Sample size, n1 = 5
Mean, x1 = 79.40
Standard deviation, s1 = 2.07
Standard Method :
Using a calculator :
Mean, x2 = 70.17
Sample size, n2 = 6
Standard deviation, s2 = 2.14
T = (x1 - x2) / √(s1²/n1 + s2²/n)
(x1 - x1) = (79.40 - 70.17) =79.40 -= 9.23
√(s1²/n1 + s2²/n2) = √(2.07²/5) + 2.14²/6) = 1.2729
T = (x1 - x2) / √(s1²/n1 + s2²/n)
T = 9.23 / 1.2729
Test statistic = 7.25
The Pvalue from Tscore at, smaller n - 1 = 5 - 1 = 4
Pvalue = 0.000961
Decision region :
If Pvalue < α ; Reject H0 ; otherwise fail to reject H0
α = 0.01
Since, Pvalue < α ; We reject H0 ; and conclude that new method is worse rhn the old.
`
Can anyone tell me why this is wrong
Answer:
i, n, e, q, u, a, l, t, y
Step-by-step explanation:
You repeated some letters.
pls give me brainliest and have a nice day! Hope it helps!
help please! include how you did it and i will give you brainilist.
Answer: A' (3, 6)
Step-by-step explanation: It is given that the point at is at the coordinate of (1, 2). In this coordinate, 1 represents the x-coordinate while 2 represents the y-coordinate. All you have to do is plug the values of x and y into (x+2)(y+4); so, it will look like this, (1+2)(2+4). Therefore, the new x-coordinate is 3 and the new y-coordinate is 6, so A'(3, 6).
5 in. 3 8 in. What is the volume, in cubic inches, of the prism? cubic inches
Answer:
70in^3
Step-by-step explanation:
Ok so the the formula for volume for a cube is V= L x W x H
so if the dimensions are 5in by 3in by 8in, the volume of the cube is 5x8x3 = 70 inches^3
Help me pleaseeeeeee
Select the best answer for the question.
10. Which one of the following pairs of numbers contains like fractions?
O A.% and 60/70
O B. 12 and 32
O C. 54 and 45
O D. 4 and 12/16
The rate of change increased by about _____ bass per a year. Round to the nearest tenth
From the exponential function, the average rate of change from year 1 to year 4 is 62.43, the average rate of change from year 5 to year 8 is 67.57 and the rate of change per year is 65
What is Exponential FunctionAn exponential function is a type of function that involves a variable in an exponent. It is of the form f(x) = a⋅b^x where a and b are constants and b > 0, b ≠ 1. The input to the function, x, is the exponent that the base, b, is raised to. The output, f(x), is the result of raising the base to the exponent.
In this problem, we have to calculate the rate of increase per year.
Data;
rate = 2%
P = 3000
The exponential growth can be calculated by;
A = P(1 + r)ⁿ
In year 1
A = 3000(1 + 0.02)¹
A = 3060
In year 4
A = 3000(1 + 0.02)⁴
A = 3247.3
a)
The average rate of change from year 1 to year 4 will be
A = [3000(1 + 0.02)⁴ - 3000(1 + 0.02)¹] / 4 - 1
A = 62.43
The average rate of change from year 1 to year 4 is 62.43
b)
The average rate of change from year 5 to year 8 is calculated as
A = [3000(1 + 0.02)⁸ - 3000(1 + 0.02)⁵] / 8 - 5
A = 67.57
C)
The rate of change increase can be calculated as;
A = [3000(1 + 0.02)⁸ - 3000(1 + 0.02)¹] / 8 - 1
A =65
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The number of views for a video on a social media website doubles every day. You begin observing the
number of views 8 days after the video was introduced. The number y of views x days after the video is introduced is
represented by the function = 22(2^x-8). When will there be one million views?
The total number of times social media browsers have been showed your content.
How is social media value calculated?A general, but simplified earned media value formula is: EMV = impressions x cost per 1000 impressions x adjustable variable. The adjustable variable can be anything you are looking to track like engagement or impressions.
Simplifying
22 = 2(x + 8)
Reorder the terms:
22 = 2(8 + x)
22 = (8 * 2 + x * 2)
22 = (16 + 2x)
Solving
22 = 16 + 2x
Solving for variable ‘x’.
Move all terms containing x to the left, all other terms to the right.
Add ‘-2x’ to each side of the equation.
22 + -2x = 16 + 2x + -2x
Combine like terms: 2x + -2x = 0
22 + -2x = 16 + 0
22 + -2x = 16
Add ‘-22’ to each side of the equation.
22 + -22 + -2x = 16 + -22
Combine like terms: 22 + -22 = 0
0 + -2x = 16 + -22
-2x = 16 + -22
Combine like terms: 16 + -22 = -6
-2x = -6
Divide each side by ‘-2’.
X = 3
Simplifying
X = 3
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I’ll mark brainlist
NO LINKS
Answer:12
Step-by-step explanation: multiply the second fraction by 3 on the top and bottom to equalize the tow fractions denominators
Rahul performed an experiment using 16 windup rubber band single-propeller airplanes. He wound up the propeller a different number of times and recorded the amount of time (in seconds) that the airplane flew for each number of rotations that the propeller was wound. A regression analysis was performed and the partial computer output is given below.
The regression equation is
Time = 0.924 + 0.0462 Rotations
Predictor Coef SE Coef T P
Constant 0.9241 0.6413 1.44 0.172
Rotation 0.04625 0.01565 2.96 0.010
S= 0.5426 ; R-Sq= 38.4% ; R -Sq(adj) =34.0%
Required:
What is a 95 percent confidence interval for the slope of the regression line that relates the number of rotations the rubber band is wound and the plane's flight time?
Answer:
0.0462 ± 2.131(0.01565)
Step-by-step explanation:
The confidence interval for the slope, :
Slope Coefficient = 0.0462
Slope Coefficient ± Margin of error
Margin of Error = Tcritical * standard error
Standard Error (rotation) = 0.01565
We use T distribution, because sample size is small ; n = 16
Tcritical at 95% ; df = n - 1 = 16 - 1 = 15
Tcritical(0.05, 15) = 2.131
Hence,
Margin of Error = 2.131(0.01565)
Slope Coefficient for rotation = 0.0462
95% Confidence interval :
0.0462 ± 2.131(0.01565)
The 95% confidence interval for the slope of the regression line is 0.0462 ± 0.0333 or (0.01284, 0.07955)
What is the margin of error?The probability or the chances of error while choosing or calculating a sample in a survey is called the margin of error.
Slope coefficient = 0.0462
Slope coefficient ± Margin of error
The margin of error will be given as
[tex]\rm Margin \ of \ error = T_{critical} \times standard \ error[/tex]
Standard error = 0.01565
We use T distribution because the sample size is small
[tex]\rm n = 16 \\\\T_{critical} \ at \ 95\% \ ; df = n-1 = 16- 1 = 15\\\\T_{critical} \ (0.05, 15) = 2.131[/tex]
Then we have
Margin of error = 2.131 × 0.01565
Margin of error = 0.0333
Then the 95% confidence interval will be
0.0462 ± 0.0333
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Debby deposits 25% if the money that she earns each week in a savibgs account if debby earns $72 each week, how much money will she deposit next week
35×75(46×13-55)-76=?
Answer:
1,425,299
Step-by-step explanation:
Answer:
1425299
Step-by-step explanation:
35×75(46×13-55)-76
multiply stuff in parenthesis
35×75(598-55)-76
subtract stuff in parenthesis
35×75(543)-76
multiply
1425375-76
subtract
1425299
How is the graph of y = −3x^2 − 8 different from the graph of y = −3x^2
a. It is shifted 8 units left.
b. It is shifted 8 units up.
c. It is shifted 8 units down.
d. It is shifted 8 units right.
Answer:
C shifted 8 units down
Step-by-step explanation:
The slope (part with x) lets us know its negative, the second number lets us know the y intercept.
SO since the original has no second number the y intercept is 0 but since the new equation is -8 it means its 8 units lower than 0 hence -8
25 POINTS PLEASE ANSWER!
A fifth grader takes a standardized achievement test (mean = 125, standard deviation = 15) and scores a 104. What percent scored less than a 104? Go to z-table.com
HOPE IT WILL HELP YOU
====================================
====================================
z = 148 - 12515
= 1.53PLEASE LOOK AT THE ATTACHMENT
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If f(x)=-4x-5 and g(x)= 3-x, what is g(-4) +f(1)?
A.-10
B.7
C.-9
D.-2
Answer:
-2
Step-by-step explanation:
sustitue -4 into x for 3-x which would equal 7 because a negative times a negative equals positive. Then substitue 1 in for x in -4x-5 which would get you -9
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8. Laurie graphed two lines, as shown on the right.
One line has a slope of -2 and the other has a slope of
1/2. Laurie noticed that although the slopes are
negative reciprocals of each other, the lines do not
appear to be perpendicular. Explain why this result
occurs, even though she graphed the lines correctly.
It's possible that the lines do not appear to be perpendicular, even though the slopes are negative reciprocals, because the lines may not be intersecting at 90 degrees angle,
What are the slopes of the two lines?
The slope of a straight line between two points says (x1,y1) and (x2,y2) can be easily determined by finding the difference between the coordinates of the points. The slope is usually represented by the letter m.
The slopes of the two lines that Laurie graphed, -2 and 1/2, are negative reciprocals of each other, which means that their product is -1.
In a Cartesian coordinate system, lines that are perpendicular to each other will have slopes that are negative reciprocals of each other, and the product of their slopes will be -1.
However, it's possible that the lines do not appear to be perpendicular, even though the slopes are negative reciprocals, because the lines may not be intersecting at 90 degrees angle.
The two lines could be skew lines that never intersect and thus cannot be perpendicular.
Another reason could be that the lines may not be in the same coordinate system or not graphed on the same set of axes.
When working with slope, we always assume that the lines are defined on a 2D Cartesian coordinate system, if that is not the case, it could cause the lines to not appear as perpendicular.
Hence, it's possible that the lines do not appear to be perpendicular, even though the slopes are negative reciprocals, because the lines may not be intersecting at 90 degrees angle, another reason could be that the lines may not be in the same coordinate system or not graphed on the same set of axes.
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Each other 11 letters of the word mathematics with written on a separate piece of paper and placed in a bowl what is the probability of drawing
Therefore, the probability of drawing "OBJ" from the bowl is (1/11) * (1/11) * (1/11) = 1/1331
Define Probability.The area of mathematics known as probability deals with numerical representations of the likelihood that an event will occur or that a statement is true. An event's probability is a number between 0 and 1, where, broadly speaking, 0 denotes the event's impossibility and 1 denotes certainty.
Define Statistics.The study of statistics focuses on gathering, organizing, organizing, analyzing, interpreting, and presenting data. It is customary to start with a statistical population or a statistical model to be researched when applying statistics to a scientific, industrial, or social problem.
The word "mathematics" has 11 letters, so there are 11 letters in the bowl. The probability of drawing the letter "O" is 1/11, since there is only 1 "O" in the 11 letters. Similarly, the probability of drawing the letter "B" is 1/11, and the probability of drawing the letter "J" is 1/11 as well.
Since the events of drawing the letter "O", "B", and "J" are independent of each other, the probability of drawing all three letters in order is the product of their individual probabilities.
Therefore, the probability of drawing "OBJ" from the bowl is (1/11) * (1/11) * (1/11) = 1/1331
It is a very low probability, the chances of drawing that sequence are very low.
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Review the diagram of a locket in the shape of an ellipse.
The major and minor axes are labeled in the diagram.
If the center of the locket is at the origin of a coordinate
plane, which equation represents the locket?
x2
361
+
72
= 1
169
OK
V2
361
+
X2
= 1
169
38 mm
x2
1.444
1
676
26 mm
0 ' '
x2
676
= 1
1,444
Answer:
D
Step-by-step explanation:
If a = 38 and b = 26 then the equation would be y^2/1444 + x^2/676 = 1
also just graph it or smth
The equation of the ellipse in the figure is x^2/676 + y^2/1296 = 1
How to determine the equation?The figure is an ellipse, and it has the following parameters:
Center, (h,k) = (0,0)Major radius = 36Minor radius = 26The equation of the ellipse is then calculated using:
x^2/r^2 + y^2/R^2 = 1
So, we have:
x^2/26^2 + y^2/36^2 = 1
Evaluate the exponents
x^2/676 + y^2/1296 = 1
Hence, the equation of the figure is x^2/676 + y^2/1296 = 1
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You find a mutual fund that offers approximately 6% APR compounded
monthly. How much will you need to invest each month for the next year in
order to have $1000?
Answer:
$81.06
A P E X :)
Mr. Hart recorded the ratio of the minutes spent driving to the miles driven while on a road trip.
Miles Driven
Number of
Minutes Number of Miles
? 40
75 60
100 80
Which graph represents these pairs of values?
The graph representing the given pairs is represented by the equation y = (4/5)x + 40.
What is expression?In mathematics, an expression or mathematical expression is a finite combination of symbols that is well-formed according to rules that depend on the context.Mathematical symbols can designate numbers (constants), variables, operations, functions, brackets, punctuation, and grouping to help determine order of operations and other aspects of logical syntax.The general equation of a straight line is → y = mx + c{m} - slope {c} - intercept along the y - axis.
Given is that Mr. Hart recorded the ratio of the minutes spent driving to the miles driven while on a road trip.
The given table is as follows -
Number of Minutes {m} : 75 60
Number of Miles {M} : 100 80
The slope of this graph will be -
m = (80 - 60)/(100 - 75)
m = 20/25
m = 4/5
The equation of the line can be written as -
y = (4/5)x + c
For the point (75, 100) as follows -
100 = 4/5 x 75 + c
100 = 4 x 15 + c
c = 100 - 60
c = 40
The equation of the graph will be -
y = (4/5)x + 40
Refer to the graph attached.
Therefore, the graph representing the given pairs is represented by the equation y = (4/5)x + 40.
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Which of the following fractions is equivalent to 10/12
Answer:
I don't know what the options are so I'm just gonna list a few and if they aren't on there lmk the options you have to choose from
Step-by-step explanation:
5/6, 15/18, 20/24, 25/30, 30/36, 35/42, 40/48, 45/54, 50/60, 55/66, 60/72, 65/78, 70/84, 75/90, 80/96, 85/102, 90/108, 95/114, 100/120
Answer:
5/6
Step-by-step explanation:
the equivalent fraction of 10/12 is 5/6 because both the numerator and the denominator are divisible by 2.
It takes 3 eggs to make a cake .how many cakes can you make with 37 eggs
Answer:
12 cakes
Step-by-step explanation:
37 / 3 = 12.33333
What is the range for this set of data? 38, 17, 55, 40 02 38 39 O 72
Answer:
38
Step-by-step explanation:
The range is the difference between the highest value and the lowest value. Here the highest value is 55 and the lowest 17. Therefore, the range is take away 17 from 55 which equals to 38
The range for this set of data is 38.
Option B is the correct answer.
What is range in a set of data?The range is a measure of dispersion or spread in a set of data.
It is defined as the difference between the largest and the smallest values in the data set.
Range provides an idea of how much the data values are spread out or dispersed.
If the range is small, it indicates that the data values are close together, while a large range indicates that the data values are spread over a wider range of values.
We have,
To find the range of a set of data, we need to subtract the smallest value from the largest value.
Here, the smallest value is 17 and the largest value is 55.
So,
The range of the data set is:
55 - 17 = 38
Thus,
The range for this set of data is 38.
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HELLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLP
Write a letter to your friend describing your hobbies. (80 words)A2/32, Chengal Nagar
Tambaram
Chennai – 600023
May 5, 2021
Dearest Malu,
I hope this letter finds you in the best of health. I received your letter the other day asking how I am spending my leisure time these days.
I have developed many hobbies over the years but collecting stamps and embroidery have been my favourite so far. Stamp collection is something I started as a kid. I had just taken a few pages off my notebook and made it my stamp book. I get so excited every time I see the postman. I wait to see what kind of stamp I will get. Knowing that I have a liking for collection of stamps, my cousins have been sending it across to me every time they find a different stamp. I can’t wait to show you my collection.
Embroidery is another hobby I picked up recently. I always liked embroidered clothes. I just started trying out different stitching patterns. Slowly, I learned almost everything, and now I am selling embroidered frames and dresses. It is so fulfilling to see a piece of work come out so well. I am sending you a gift along with this letter, something I made, as your birthday is fast approaching.
Hope to meet you soon.
Your dearest friend,
Renitaالسلام عليكماخوي عارض شريطPandemic
Given the number 254, 476, 951
What number is in the TEN THOUSAND's SPOT?
Step-by-step explanation: 1 is in the ten thousand places and has a place value of 10,000. 3 is in the thousand's place and has a place value of 3,000. 5 is in the hundreds and has a place value of 500.
There are 5 yellow golf balls, 3 red golf balls, and 10 white golf balls in a bag. What are the odds of randomly choosing a yellow golf ball?
Answer:
5/18
Step-by-step explanation:
Answer:
2
Step-by-step explanation:
1+1=2
salve for y √(7-x)²+(9-y)²
The solution for y in the equation √(7 - x)² + (9 - y)² is infinite many solutions
How to determine the solution for yFrom the question, we have the following parameters that can be used in our computation:
√(7-x)²+(9-y)²
Express tthe equation properly
So, we have the following representation
√(7 - x)² + (9 - y)²
The above is an expression, not an equation
This means that the value of the variable y can take any value and the equation will be true
In other words, it means that the variable y has infinite many solutions because it is not an equation but it is an expression
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Refer to the diagram shown.
I need help with this please help me
Answer: Angle-Side-Angle Theorem
Step-by-step explanation:
The two triangles are shown to have congruent angles. By the Reflexive Property of Congruence, Side PM is shared and congruent between the two.
Because the angles are on either side (left and right) of the shared side, the triangles are congruent by the Angle-Side-Angle Theorem.
Which of the following statements must be true based on the diagram below?
Select all that apply. (Diagram is not to scale.)
As a result, after studying the diagram below of triangle and considering the reasons that follow, the appropriate answers are 1, 2, 3, and 4.
Define triangle.Any three points in a plane can be connected to create triangles, which are polygonal (shapes) with three sides and three angles. They are among the first shapes in geometry that are explored. Since each polygon (with 4, 5, 6, or n sides) may be divided into triangles, triangles are particularly significant.
Here,
A segment bisector in this case is 1)OP.
Since segment LKMN is not divided into two equal sections, NO OP is not a segment bisector.
A perpendicular bisector is
2)OP.
NO,Because a perpendicular bisector creates an angle to the normal and divides a segment into two equal halves, OP is not a perpendicular bisector.
The angle bisector NO is OP.
Due to the fact that OP they do not divide any angles into two equal pieces.
4) The diagram's vertex of a pair of congruent angles is O.
YES Since O lines connect two angles with the same degree ()
5)O is the right angle's vertex.
NO
As a result of things not being at a straight angle.
6) A segment's midway in the diagram
By drawing diagonals across the four vertices LMNK, it is possible to determine where this segment's midpoint lies.
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write the equation of the line that passes through the pointe (-6,1) and (2,5).
Answer:
y=1/2x+4
Step-by-step explanation:
m = y2-y1/x2-x1 = 5-1/2-(-6) = 4/8 = 1/2
since you have the slope, graph the points and find the y-intercept.
y=1/2x+4
Help PLZZ no files
Jessica's teacher asked her to create a histogram representing students and cell phone use.
Which would be the BEST question to obtain statistical data?
А
Are symbols used in your text messages?
B
How many text messages do you send each day?
с
Do you have an unlimited texting package on your phone?
D
In the past month have you sent over 100 text messages?
I’m
Answer:
B.
Why?
Step-by-step explanation:
"Jessica's teacher asked her to create a "histogram" representing students and cell phone use."
the hint histogram means the history or record of
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