why do we use the paired t test for these data? in other words, why these two samples are matched pairs? select the most suitable answer.

To find the value of the ratio b/a for the 3.0 kg ball and the 1.0 kg ball placed at opposite ends of a massless beam in equilibrium, we can use the principle of moments.

Solution:

Step 1: Identify the forces and distances involved. The 3.0 kg ball has a force of 3.0g (g represents gravity) acting at distance a from the pivot point. The 1.0 kg ball has a force of 1.0g acting at distance b from the pivot point.

Step 2: Apply the principle of moments. For the system to be in equilibrium, the clockwise moment and anticlockwise moment must be equal. This means that the product of the force and distance for each ball must be equal:

3.0g × a = 1.0g × b

Step 3: Solve for the ratio b/a. First, divide both sides of the equation by g:

3.0a = 1.0b

Now, divide both sides of the equation by 3.0a:

b/a = 1/3

The value of the ratio b/a is 1/3.

The ratio is 1:3

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The vertices of the image of QRTW for a dilation with center (0, 0) and a scale factor of 1/4 include the following:

Q' (-0.5, 0.75).

R' (-0.75, 0.25).

T' (0.5, -0.25).

W' (0.25, 1).

In Mathematics and Geometry, dilation can be defined as a type of transformation which typically changes the size of a geometric object, but not its shape.

Next, we would have to dilate the coordinates of the pre-image by using a scale factor of 1/4 centered at the origin (0, 0) as follows:

Ordered pair Q (-2, 3) → Ordered pair Q' (-2 × 1/4, 3 × 1/4) = (-0.5, 0.75).

Ordered pair R (-3, 1) → Ordered pair R' (-3 × 1/4, 1 × 1/4) = (-0.75, 0.25).

Ordered pair T (2, -1) → Ordered pair T' (2 × 1/4, -1 × 1/4) = (0.5, -0.25).

Ordered pair W (2, 4) → Ordered pair W' (2 × 1/4, 4 × 1/4) = (0.25, 1).

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The pie chart accurately represents the data from the poll, as it accurately shows the proportion of people who agreed with each candidate's positions.

The pie chart presents a good representation of the data from the poll taken asking people if they agreed with the positions of the 4 candidates for a county office. This is because the pie chart accurately shows the proportion of people who agreed with each candidate's positions. For example, the chart indicates that 26% of the people agreed with Candidate A's positions, 28% agreed with Candidate B's positions, 29% agreed with Candidate C's positions, and 17% agreed with Candidate D's positions. In order to calculate the proportions, the total number of people who responded to the poll was divided by each individual candidate's number of supporters. For example, for Candidate A, the proportion of people who agreed with their positions was calculated by dividing the total number of people responding to the poll (100) by the number of people who agreed with Candidate A's positions (26), resulting in a proportion of 0.26 or 26%. This same approach was used to calculate the proportions of each candidate's supporters. Therefore, the pie chart accurately presents the data from the poll and is a good representation of the data.

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The associative property works with expressions that use multiplication and addition. The correct option is (D).

The associative property is a rule in mathematics that allows us to change the grouping of the numbers or variables in an expression without changing the result. This property only applies to addition and multiplication, and not to subtraction and division.

The associative property of addition tells us that we can add a group of numbers in any order, and the result will be the same. For example, (2 + 3) + 4 is the same as 2 + (3 + 4). The associative property of multiplication tells us that we can multiply a group of numbers in any order, and the result will be the same. For example, (2 × 3) × 4 is the same as 2 × (3 × 4).

However, the associative property does not work with subtraction and division. For example, (10 - 3) - 2 is not the same as 10 - (3 - 2). Similarly, (12 ÷ 2) ÷ 3 is not the same as 12 ÷ (2 ÷ 3). Therefore, the correct answer to the question is D - the associative property works with expressions that use multiplication and addition.

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[tex]y = 2800(1.033)^t[/tex] is the exponential function for starting population of 2800 bacterium cells that is shown to multiply exponentially over time using this function, increasing by a factor of 1.033 every hour.

We can use an exponential function of the type y = abt to simulate the development of bacteria cells over time, where y stands for the number of cells, t for the number of hours, and a and b for constants that we must establish.

Since we now know there are 2800 bacterium cells, we can enter this number into the equation to obtain:

[tex]2800 = ab^0[/tex]

By simplifying this equation, we obtain a = 2800, which informs us that there are 2800 bacterium cells in the initial population.

We must use the knowledge that the number of cells rises by 3.3% every hour to get the value of b. By dividing this percentage growth by 100, we can convert it to a decimal, yielding a growth rate of 0.033. The value of b can then be obtained by multiplying this growth rate by 1:

b = 1 + 0.033 = 1.033

These values of a and b are what we obtain when we enter them into our exponential function:

[tex]y = 2800(1.033)^t[/tex]

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The answers

are 12, 15, 13

__________________________________________________________

The sum of two sides must be equal to or greater than the third side.

4+15 = 19; 4 + 19 = 23; 15 + 19 = 34.

19 is a possible answer.

4 + 15 = 19; 15 + 15 = 30

15 is a possible answer.

4 + 15 = 19; 4 + 13 = 17; 15 + 13 = 28

13 is a possible answer.

4 + 12 = 16; 4 + 15 = 19; 15 + 12 = 27

12 is a possible answer.

4 + 11 = 15; 4 + 15  = 19; 11 + 15 = 26

11 is a possible answer.

15 + 4 = 19; 4 + 4 = 8

4 is NOT a possible answer because 4 + 4 is less than 15.

--------------------------------------HAVE A NICE DAY--------------------------------------------

Answers:

Q.1 B. 6.88.

Q2. Sorry Not clearly visible its blurred

Q3. The closest answer choice is C. 4.9

Q4. 2.94

Q5. Set B

Q6. C

Step-by-step explanation:

Q1.

To find the mean absolute deviation, we first need to find the mean of the data set

Data: 32, 43, 38, 28, 51

Mean = (32 + 43 + 38 + 28 + 51) / 5 = 38.4

Next, we need to find the absolute deviations of each number from the mean

|32 - 38.4| = 6.4

|43 - 38.4| = 4.6

|38 - 38.4| = 0.4

|28 - 38.4| = 10.4

|51 - 38.4| = 12.6

To find the mean absolute deviation, we need to take the average of these absolute deviations

Mean Absolute Deviation = (6.4 + 4.6 + 0.4 + 10.4 + 12.6) / 5 = 6.88

Therefore, the answer is B. 6.88.

Q3.

To find the mean absolute deviation, we first need to find the mean of the data set

Data: 12.7, 22, 23.5, 24, 11, 22

Mean = (12.7 + 22 + 23.5 + 24 + 11 + 22) / 6= 18.2

Next, we need to find the absolute deviations of each number from the mean

|12.7 - 18.2| = 5.5

|22 - 18.2| = 3.8

|23.5 - 18.2| = 5.3

|24 - 18.2| = 5.8

|11 - 18.2| = 7.2

|22 - 18.2| = 3.8

To find the mean absolute deviation, we need to take the average of these absolute deviations

Mean Absolute Deviation = (5.5 + 3.8 + 5.3 + 5.8 + 7.2 + 3.8) / 6 = 5.9

Therefore, the closest answer choice is C. 4.9. However, this answer is not correct as the calculated value is 5.9.

Q4.

To find the average distance of these points from the mean of the data, we need to first find the mean of the data.

The mean of the data can be found by adding up all the values and dividing by the total number of values:

Mean = (-8 + 6.2 + 2.5 + 12 - 2 - 1.3 + 15 - 2 + 0 + 7) / 10

= 29.4 / 10

= 2.94

The average distance from the mean is found by taking the absolute value of the difference between each value and the mean, adding them up, and dividing by the total number of values:

Average Distance from Mean = (|(-8) - 2.94| + |6.2 - 2.94| + |2.5 - 2.94| + |12 - 2.94| + |-2 - 2.94| + |-1.3 - 2.94| + |15 - 2.94| + |-2 - 2.94| + |0 - 2.94| + |7 - 2.94|) / 10

= (10.94 + 3.26 + 0.44 + 9.06 + 4.94 + 4.24 + 12.06 + 4.94 + 2.94 + 4.06) / 10

= 5.688

Therefore, the average distance of these points from the mean of the data is 5.688, which is option D.

Q5.

o find out if the mean and median are equal in a set of data, we need to calculate both the mean and median and compare them.

Mean is calculated by adding up all the values and dividing by the total number of values.

Median is the middle value of the data when it is arranged in order.

Let's calculate the mean and median of both data sets:

A. (5, 3, 5, 8, 2, 5)

Mean = (5 + 3 + 5 + 8 + 2 + 5) / 6

= 4.6667

To calculate the median, we first need to arrange the data in order:

2, 3, 5, 5, 5, 8

Since the data set has an even number of values, the median is the average of the middle two values:

Median = (5 + 5) / 2

= 5

Since the mean and median of set A are not equal (4.6667 ≠ 5), set A is not the correct answer.

B. (7, 3, 5, 11, 5, 3)

Mean = (7 + 3 + 5 + 11 + 5 + 3) / 6

= 5.8333

To calculate the median, we first need to arrange the data in order:

3, 3, 5, 5, 7, 11

Since the data set has an even number of values, the median is the average of the middle two values:

Median = (5 + 5) / 2

= 5

Since the mean and median of set B are equal (5.8333 ≈ 5), set B is the correct answer.

Therefore, the set of data in which the mean and median are equal is set B: (7, 3, 5, 11, 5, 3). Answer: B.

Q6.

To answer this question, we need to first find the mean, median, and range of the data:

Data: 10, 23, 52, 18, 5, 60, 35

Mean = (10 + 23 + 52 + 18 + 5 + 60 + 35) / 7

= 28.57

Median = 23

To find the range, we need to subtract the smallest value from the largest value:

Range = 60 - 5

= 55

Now, let's evaluate each statement:

A. The mean is greater than the range.

- 28.57 > 55

- This statement is false.

B. The range is 50.

- The range is 55, not 50.

- This statement is false.

C. The median is less than the mean.

- The median is 23 and the mean is 28.57

- This statement is true.

D. The median is greater than the range.

- 23 > 55

- This statement is false.

Therefore, the statement that is true is C. The median is less than the mean.

6(y - 7z) This is a product with a whole number greater than 1 (6), since we factored out a 6 from the original expression.

A factor is an expression or number that evenly divides another expression or number without leaving a remainder.

To factor the expression 6y - 42z, we need to find the greatest common factor (GCF) of the two terms.

The GCF of 6y and 42z is 6, since both terms are divisible by 6. We can factor out the 6 from both terms, leaving:

6(y - 7z)

Notice that the term inside the parentheses (y - 7z) cannot be factored any further, since there is no common factor other than 1. Therefore, the fully factored form of 6y - 42z is:

6(y - 7z)

This is a product with a whole number greater than 1 (6), since we factored out a 6 from the original expression.

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There is no solution if the boundary conditions are inconsistent, i.e., if y(0) ≠ y(L) = 1.

We are given the boundary-value problem:

y" + 16y = 0, y(0) = 1, y(L) = 1

The characteristic equation is r^2 + 16 = 0, which has roots r = ±4i.

The general solution to the differential equation is then y(x) = c1cos(4x) + c2sin(4x).

Using the boundary conditions, we get:

y(0) = c1 = 1

y(L) = c1cos(4L) + c2sin(4L) = 1

Substituting c1 = 1 into the second equation, we get:

cos(4L) + c2*sin(4L) = 1

Solving for c2, we get:

c2 = (1 - cos(4L))/sin(4L)

Thus, the general solution to the differential equation that satisfies the given boundary conditions is:

y(x) = cos(4x) + (1 - cos(4L))/sin(4L)*sin(4x)

Now, we can answer the questions:

(a) To have precisely one nontrivial solution, we need the coefficients c1 and c2 to be uniquely determined. From the above expression for c2, we see that this is only possible if sin(4L) is nonzero. Thus, if sin(4L) ≠ 0, there exists precisely one nontrivial solution.

(b) If sin(4L) = 0, then c2 is undefined and we have a family of solutions that differ by a constant multiple of sin(4x). Hence, there are infinitely many solutions.

(c) There is no solution if the boundary conditions are inconsistent, i.e., if y(0) ≠ y(L) = 1.

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Answer:

1.6 minutes

Step-by-step explanation:

6.4 meters/4 speed

This shows that TB did not have a game-long advantage but rather needed to recover from a deficit to triumph.

A subfield of mathematics known as probability studies random events and the possibility that they will occur. It entails calculating the probability of an event happening and expressing it as a number between 0 and 1, with 0 denoting an impossibility and 1 denoting a certainty. The possibility of a coin landing heads-up, the chances of winning a game, or the likelihood of a disease spreading throughout a population are just a few examples of real-world occurrences that may be studied and understood using probability.

given

It is most likely that option 1 happened, according to the victory probability chart in the illustration provided: TB came out as the favourite, trailed for the majority of the game, then made a late comeback.

The graph demonstrates that the victory probability for TB initially increased before sharply declining as NO seized the lead and kept it for the most of the game.

The dramatic increase in the win probability for TB towards the end of the chart, however, shows that TB came back and won in the final few minutes of the game.

This shows that TB did not have a game-long advantage but rather needed to recover from a deficit to triumph.

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Answer:quadrant ll

Step-by-step explanation:

Answer:

Paper clip, Mobile phone, S​, Tennis racket, Car, Football pitch.

The extraneous solution which arises when solving for the point of intersection of the line and the square root function is 20.

What is an extraneous solution?

An extraneous solution in mathematics is a solution that develops during the process of addressing the problem but is not a legitimate solution to the problem, such as the answer to an equation.

We are given two equations as f(x) = [tex]\frac{-1}{2}[/tex]x + 6 and f(x) = √x - 4.

Now, on equating both the equations, we get

⇒ [tex]\frac{-1}{2}[/tex]x + 6 = √x - 4

On squaring both sides, we get,

⇒ [tex](\frac{-1}{2}x + 6)^{2}[/tex]= x - 4

⇒ [tex]\frac{1}{4}x^{2}[/tex] + 36 - 6x = x - 4

⇒ [tex]\frac{1}{4}x^{2}[/tex] + 40 = 7x

⇒ [tex]\frac{1}{4}x^{2}[/tex] -7x + 40 = 0

⇒ [tex]x^{2}[/tex] -28x + 160 = 0

⇒ x = 20 , 8

For point of intersection, we will substitute x = 20 in both the equations.

So, we get

⇒ f(x) = [tex]\frac{-1}{2}[/tex] (20) + 6

⇒ f(x) = -10 + 6

⇒ f(x) = -4

Similarly,

⇒ f(x) = √20 - 4

⇒ f(x) = √16

⇒ f(x) = 4

Since both the solutions are not same so this is an extraneous solution.

Hence, the extraneous solution which arises is 10.

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Given that the perimeter of the square base is 32 cm, The surface area of the square pyramid is 304 cm².

The surface area of a square pyramid can be calculated using the formula: SA = B + (1/2)Pl, where B is the area of the base, P is the perimeter of the base, l is the slant height, and SA is the total surface area.

Given that the perimeter of the square base is 32 cm, we can divide it by 4 to find the length of each side: 32 cm / 4 = 8 cm.

Now, we can calculate the area of the base by squaring the length of a side: B = (8 cm)² = 64 cm²

Using the given slant height of 15 cm, we can plug in the values into the formula for SA: SA = 64 cm² + (1/2)(32 cm)(15 cm) = 64 cm² + 240 cm² = 304 cm².

Therefore, the surface area of the square pyramid is 304 cm².

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The high school dropout rate in the United States is greater than 25 percent. C. Wright Mills would classify this situation as a societal issue.

This is because societal issues are matters of public concern that affect large numbers of people and require collective action to resolve. The high school dropout rate in the United States is an example of a societal issue because it has widespread implications for both individuals and society as a whole.

According to Mills, a societal issue is one that cannot be attributed solely to the actions of individuals. Instead, it is the result of social structures and processes that operate at a broader level.

For example, the high school dropout rate in the United States is influenced by a variety of factors such as poverty, race, and family background. These factors are not solely determined by the actions of individual students but are instead shaped by broader social forces such as economic inequality and institutional racism.

To address the high school dropout rate, therefore, requires collective action at the societal level. This may involve policy changes, community-based initiatives, or other forms of collective action aimed at addressing the underlying social factors that contribute to the problem.

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The answer to the expression 547 + 233 × 5 - 142 is 1752. To solve the expression, we must follow the order of operations, which is PEMDAS: Parentheses, Exponents, Multiplication, and Division (performed left to right), and Addition and Subtraction (performed left to right).

Since there are no parentheses or exponents in this expression, we start with multiplication and division. In this case, we have to multiply 233 by 5, which gives us 1165. Then, we add 547 to 1165, which gives us 1712. Finally, we subtract 142 from 1712, which gives us the final answer of 1752. Therefore, the result of the expression 547 + 233 × 5 - 142 is 1752, which can be obtained by following the order of operations and performing the arithmetic operations in the correct order.

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A right pyramid with an equilateral triangular base has a lateral face with a surface area of 75 square meters. The side of the base of a slant with a height of 30 meters is 5 meters long.

Let’s call the side length of the equilateral triangular base “s”. We know that the area of one lateral face is 75 square meters, and that face is a triangle with base s and height 30 meters (the slant height). We can use the formula for the area of a triangle to solve for s:

Area = (1/2) * base * height

75 = (1/2) * s * 30

Simplifying the equation, we get:

75 = 15s

s = 75/15

s = 5

Therefore, the length of the side of the equilateral triangular base is 5 meters.

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The probability of the repair person taking 3 or more hours to fix the machine is 0.3, or 30%.

As an AI language model, I do not have the specific information needed to answer this question. However, we can use probability theory to solve this problem.

Let's assume that the probability of repairing the machine in 2 hours or less is p, and the probability of taking more than 2 hours is q (which is the same as saying the probability of taking 3 or more hours).

We know that p + q = 1, meaning that the sum of the probabilities of repairing in 2 hours or less and taking more than 2 hours is equal to 1, which represents the total probability.

Now, if we know the value of p, we can easily calculate q by subtracting it from 1:

q = 1 - p

For example, if we assume that the probability of repairing in 2 hours or less is 0.7, then the probability of taking more than 2 hours is:

q = 1 - 0.7 = 0.3

So, in this case, the probability of the repair person taking 3 or more hours to fix the machine is 0.3, or 30%.

However, without knowing the specific probabilities of the repair person finishing within 2 hours or the probabilities of taking longer, we cannot provide an accurate answer to this question.

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Step-by-step explanation:

729 = 9³ = (3²)³ = 3⁶

I hour that is what you needed.

a) Mean time between counts is 0.3333 minutes.

b) Standard deviation of time between counts is 0.5774 minutes.

a. Mean time between counts: The mean time between counts can be computed as the inverse of the Poisson rate parameter (λ): Mean time between counts = 1/λ.

The average of 3 counts per minute is the same as the rate parameter λ in a Poisson process. Thus, the mean time between counts is: Mean time between counts = 1/λ = 1/3 = 0.3333 minutes (20 seconds approximately).

b. Standard deviation of the time between counts: The standard deviation of a Poisson process is equal to the square root of the mean.

Therefore, the standard deviation of the time between counts can be calculated as follows: Standard deviation of time between counts = sqrt(mean) = sqrt(1/λ) = sqrt(1/3) = 0.5774 minutes (approximately 35 seconds).

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The z-score for an IQ score of 122 is 2.

This is calculated by subtracting the mean (100) from the score (122) and dividing by the standard deviation (15). So, 122-100=22, 22/15=2.

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In linear programming, the feasible region is the set of all feasible solutions that satisfy the constraints of the problem. The feasible corner points are the extreme points of the feasible region, which represent the optimal solutions to the problem. In this case, we have four feasible corner points: (48,84), (0,120), (0,0), and (90,0).

To find the maximum possible value for the objective function, we need to evaluate the objective function at each of the feasible corner points and select the one that gives the highest value. The objective function is a linear combination of the decision variables and represents the quantity that we are trying to maximize or minimize.

Assuming that the objective function is in the form of z = ax + by, where x and y are the decision variables and a and b are constants, we can evaluate the objective function at each of the feasible corner points:

At (48,84): z = a(48) + b(84)

At (0,120): z = a(0) + b(120)

At (0,0): z = a(0) + b(0)

At (90,0): z = a(90) + b(0)

Since we don't have the values of a and b, we cannot calculate the maximum possible value of the objective function. However, we can compare the values of the objective function at each of the feasible corner points and select the one that gives the highest value.

Therefore, we can conclude that the maximum possible value for the objective function will be obtained at one of the feasible corner points: (48,84), (0,120), (0,0), or (90,0).

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The initial amount injected was 50 milligrams and  after 7 hours, there are approximately 16.08 milligrams of the drug in the patient's bloodstream.

The function that models the number of milligrams D(h) in a patient's bloodstream h hours after the drug is injected is:

D(h) = 50e^(-0.2h)

To find the initial amount injected, we can evaluate D(0):

D(0) = 50e^(-0.2*0) = 50e^0 = 50

Therefore, the initial amount injected was 50 milligrams.

To find the amount in the bloodstream after 7 hours, we can evaluate D(7):

D(7) = 50e^(-0.2*7) ≈ 16.08

Therefore, after 7 hours, there are approximately 16.08 milligrams of the drug in the patient's bloodstream.

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Answer:

120°

Step-by-step explanation:

We know that the exterior angle of a triangle is equal to the sum of the interior opposite angles.

Let the unknown angle be x.

Accordingly,

70° + 50° = x

120° = x

To put fractions in order from least to greatest, you need to compare their values by finding the common denominator.

Step 1: Find a common denominator for all the fractions.

Step 2: Convert each fraction to an equivalent fraction with the common denominator.

Step 3: Compare the numerators of the equivalent fractions. The fraction with the smallest numerator is the smallest fraction, and the fraction with the largest numerator is the largest fraction.

Step 4: If two or more fractions have the same numerator, compare their denominators. The fraction with the smallest denominator is the smallest fraction, and the fraction with the largest denominator is the largest fraction.

Step 5: Write the fractions in order from least to greatest.

For example, let's say you need to put the fractions 1/3, 2/5, and 3/8 in order from least to greatest.

Step 1: The common denominator for 3, 5, and 8 is 120.

Step 2: Convert each fraction to an equivalent fraction with a denominator of 120.

1/3 = 40/120

2/5 = 48/120

3/8 = 45/120

Step 3: Compare the numerators of the equivalent fractions: 40 < 45 < 48

Step 4: Since 40 is not equal to 45 or 48, we don't need to compare the denominators.

Step 5: Write the fractions in order from least to greatest: 1/3 < 3/8 < 2/5.

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The probability that at least 67 out of 100 cars stopped at a roadblock will not be given a ticket is 2.37.

Given Probability of giving tickets to cars that are stopped = 0.23

Probability of not giving tickets to cars that are stopped = 1 - 0.23 = 0.77

the probability that at least 67 out of 100 cars stopped at a roadblock will not be given a ticket

Here n = 100, p = 0.77, q = 0.23

mean = np = 100*0.77 = 77

standard deviation = [tex](sigma = \sqrt{(100)*(0.77)*(0.23) } = 4.208[/tex]

[tex]P(X\geq 67) = \frac{67 - 77}{4.208}[/tex] = 2.37

P-VALUE is 0.99126 from z-table

Probability is a fundamental concept in mathematics that helps us quantify the likelihood of events occurring and is applicable to a wide range of fields. It is a measure of the uncertainty of an event, expressed as a number between 0 and 1. An event with probability 0 is impossible, while an event with probability 1 is certain.For example, the probability of rolling a six on a fair six-sided die is 1/6, since there is only one favorable outcome out of six possible outcomes.

Probability theory has wide applications in fields such as statistics, finance, engineering, and physics, among others. It is used to model and analyze various phenomena, including weather patterns, stock prices, quantum mechanics, and more.

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Answer:

42 m2

Step-by-step explanation:

3=18

7=?

=7 × 13 ÷ 3

=42

Answer:

he puts 3.354.235 pounds in it

Step-by-step explanation:

because the synapses hypural torminal that's the only answer that make since.