Question 1

What is the mean for the following set of scores: 20,24,26,22,18,16,18?

Accepted Answer

A) 18 
B) 24 
C) 20.57 
D) 14.57

Question 2

If Σ(X - M)2 = 235,and n = 29,what is s?

Accepted Answer

A) 11.3 
B) 23.5 
C) 8.39 
D) 2.90

Question 3

The highest score minus the lowest score is equal to the ______.

Accepted Answer

A) standard deviation 
B) inclusive range 
C) exclusive range 
D) variance

Question 4

Unbiased estimates are considered to be less conservative estimates.

Accepted Answer

A) True 
 B)False

Question 5

What is another term for variability?

Accepted Answer

A) flux or variation 
B) scattergram 
C) skewness 
D) spread or dispersion

Question 6

What are the three measures of variability? Which is the most commonly reported?

Accepted Answer

The answer of What are the three measures of variability?...

Question 7

All of the following are measures of variability EXCEPT ______.

Accepted Answer

A) mean 
B) standard deviation 
C) variance 
D) range

Question 8

If you have a standard deviation of 5,your variance will be ______.

Accepted Answer

A) 4 
B) 25 
C) 5 
D) 625

Question 9

What is the variance for the following set of scores: 10,15,12,18,19,16,12?

Accepted Answer

A) 3.36 
B) 11.29 
C) 6.47 
D) 17.18

Question 10

Which of the following is one way to represent the standard deviation?

Accepted Answer

A) s 
B) s2 
C) s(2) 
D) s / n

Question 11

Which measure of variability is most general and,hence,least useful?

Accepted Answer

A) median 
B) range 
C) standard deviation 
D) mean deviation

Question 12

Variance is an easy number to interpret.

Accepted Answer

A) True 
 B)False

Question 13

Unbiased estimates ______.

Accepted Answer

A) are less conservative estimates of sample statistics 
B) are more conservative estimates of sample statistics 
C) are less conservative estimates of population parameters 
D) are more conservative estimates of population parameters

Question 14

Which measure of variability should never be used alone to reach conclusions regarding the variance of a distribution?

Accepted Answer

A) standard deviation 
B) mode 
C) variance 
D) range

Question 15

In the formula for computing the range,______ is used to represent the range.

Accepted Answer

A) rho 
B) Ran 
C) r 
D) rhi

Question 16

If you subtract the smallest number in the distribution from the largest,what type of variability is being calculated?

Accepted Answer

A) variance 
B) range 
C) outliers 
D) standard deviation

Question 17

Why is the square root taken when computing s?

Accepted Answer

The answer of Why is the square root taken when...

Question 18

What is the formula for calculating the exclusive range?

Accepted Answer

A) r - n + 1 
B) h - l + 1 
C) (h - 1)r 
D) h - 1

Question 19

Which measure of variability is easiest to calculate?

Accepted Answer

A) standard deviation 
B) mode 
C) range 
D) variance

Question 20

It is impossible for a set of data to have no variability.

Accepted Answer

A) True 
 B)False

Exam 3: Understanding Variability: Vive La Différence

What is the mean for the following set of scores: 20,24,26,22,18,16,18?

If Σ(X - M) ² = 235,and n = 29,what is s?

The highest score minus the lowest score is equal to the ______.

Unbiased estimates are considered to be less conservative estimates.

What is another term for variability?

What are the three measures of variability? Which is the most commonly reported?

All of the following are measures of variability EXCEPT ______.

If you have a standard deviation of 5,your variance will be ______.

What is the variance for the following set of scores: 10,15,12,18,19,16,12?

Which of the following is one way to represent the standard deviation?

Which measure of variability is most general and,hence,least useful?

Variance is an easy number to interpret.

Unbiased estimates ______.

Which measure of variability should never be used alone to reach conclusions regarding the variance of a distribution?

In the formula for computing the range,______ is used to represent the range.

If you subtract the smallest number in the distribution from the largest,what type of variability is being calculated?

Why is the square root taken when computing s?

What is the formula for calculating the exclusive range?

Which measure of variability is easiest to calculate?

It is impossible for a set of data to have no variability.

Exam 3: Understanding Variability: Vive La Différence

What is the mean for the following set of scores: 20,24,26,22,18,16,18?

If Σ(X - M) 2 = 235,and n = 29,what is s?

The highest score minus the lowest score is equal to the ______.

Unbiased estimates are considered to be less conservative estimates.

What is another term for variability?

What are the three measures of variability? Which is the most commonly reported?

All of the following are measures of variability EXCEPT ______.

If you have a standard deviation of 5,your variance will be ______.

What is the variance for the following set of scores: 10,15,12,18,19,16,12?

Which of the following is one way to represent the standard deviation?

Which measure of variability is most general and,hence,least useful?

Variance is an easy number to interpret.

Unbiased estimates ______.

Which measure of variability should never be used alone to reach conclusions regarding the variance of a distribution?

In the formula for computing the range,______ is used to represent the range.

If you subtract the smallest number in the distribution from the largest,what type of variability is being calculated?

Why is the square root taken when computing s?

What is the formula for calculating the exclusive range?

Which measure of variability is easiest to calculate?

It is impossible for a set of data to have no variability.

If Σ(X - M) ² = 235,and n = 29,what is s?