Question 1

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

Accepted Answer

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

Question 2

The highest score minus the lowest score plus one is equal to the _______.

Accepted Answer

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

Question 3

What is obtained by taking the square root of the variance?

Accepted Answer

A) standard deviation 
B) mean 
C) mode 
D) mean deviation 
A) standard deviation 
B) mean 
C) mode 
D) mean deviation

Question 4

The sum of the deviations from the mean will always be equal to _______.

Accepted Answer

A) zero 
B) one 
C) n − 1 
D) n + 1 
A) zero 
B) one 
C) n − 1 
D) n + 1

Question 5

The standard deviation is sensitive to extreme scores.

Accepted Answer

A) True 
 B)False

Question 6

Which measure of variability is a measure of the average distance from the mean?

Accepted Answer

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

Question 7

If Σ(X − M)² = 235, and n = 29, what is s²?

Accepted Answer

A) 8.10 
B) 8.39 
C) 2.90 
D) 43.64 
A) 8.10 
B) 8.39 
C) 2.90 
D) 43.64

Question 8

As your sample size grows larger, your standard deviation will be ______.

Accepted Answer

A) a more accurate estimate of the population 
B) a less accurate estimate of the population 
C) the accuracy will not change 
D) this cannot be determined 
A) a more accurate estimate of the population 
B) a less accurate estimate of the population 
C) the accuracy will not change 
D) this cannot be determined

Question 9

If you know the standard deviation, what is the quick way to compute the variance?

Accepted Answer

You can square the s

Question 10

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

Question 11

What are the strengths and limitations of the range?

Accepted Answer

The range is the most general estimate o

Question 12

What is the difference between the inclusive and exclusive range?

Accepted Answer

The inclusive range is the hig

Question 13

If n = 24 and s = 1.56, what is the variance?

Accepted Answer

A) 2.43 
B) 1.25 
C) 0.06 
D) 0.0065 
A) 2.43 
B) 1.25 
C) 0.06 
D) 0.0065

Question 14

The exclusive range is more commonly used in research articles as compared with the inclusive range.

Accepted Answer

A) True 
 B)False

Question 15

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

Accepted Answer

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

Question 16

When computing the standard deviation, why are the deviations from the mean squared?

Accepted Answer

In order to compute the standard deviati

Question 17

Which of the following sets of scores has the greatest variability?

Accepted Answer

A) 7, 10, 11, 15, 19 
B) 7, 7, 8, 8, 10, 11 
C) 7, 7, 7, 7, 7, 7 
D) 6, 6, 7, 7, 7, 7 
A) 7, 10, 11, 15, 19 
B) 7, 7, 8, 8, 10, 11 
C) 7, 7, 7, 7, 7, 7 
D) 6, 6, 7, 7, 7, 7

Question 18

The larger the standard deviation, the less spread out the values are.

Accepted Answer

A) True 
 B)False

Question 19

When using sample estimates to estimate population parameters, you should use ______.

Accepted Answer

A) biased statistics 
B) unbiased statistics 
C) either biased or unbiased statistics 
D) none of these 
A) biased statistics 
B) unbiased statistics 
C) either biased or unbiased statistics 
D) none of these

Question 20

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

Exam 3: Vive La Différence: Understanding Variability

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

The highest score minus the lowest score plus one is equal to the _______.

What is obtained by taking the square root of the variance?

The sum of the deviations from the mean will always be equal to _______.

The standard deviation is sensitive to extreme scores.

Which measure of variability is a measure of the average distance from the mean?

If Σ(X − M)² = 235, and n = 29, what is s²?

As your sample size grows larger, your standard deviation will be ______.

If you know the standard deviation, what is the quick way to compute the variance?

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

What are the strengths and limitations of the range?

What is the difference between the inclusive and exclusive range?

If n = 24 and s = 1.56, what is the variance?

The exclusive range is more commonly used in research articles as compared with the inclusive range.

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

When computing the standard deviation, why are the deviations from the mean squared?

Which of the following sets of scores has the greatest variability?

The larger the standard deviation, the less spread out the values are.

When using sample estimates to estimate population parameters, you should use ______.

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

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