Question 1

Which of the following symbols identifies the sample variance?

Accepted Answer

A)  s
B)  s2
C)  σ
D)  σ 2E) All of the above
F) A) and B)

Question 2

If the population variance is 4, then the standard deviation will be σ = 16.

Accepted Answer

A) True 
 B)False

Question 3

For a population, a deviation score is computed as X - μ.

Accepted Answer

A) True 
 B)False

Question 4

A positive deviation always indicates a score that is less than the mean.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following symbols identifies the population standard deviation?

Accepted Answer

A)  s
B)  s2
C)  σ
D)  σ 2E) A) and B)
F) A) and C)

Question 6

The sum of the squared deviation scores is SS = 20 for a sample of n = 5 scores.What is the variance for this sample?

Accepted Answer

A)  4
B)  5
C)  80
D)  100E) None of the above
F) A) and D)

Question 7

For a population of N = 4 scores with $\sum$X = 10 and $\sum$X2 = 30, SS = 5.

Accepted Answer

A) True 
 B)False

Question 8

A population of scores has µ = 50 and σ = 5.If every score in the population is multiplied by 3, then what are the new values for the mean and standard deviation?

Accepted Answer

A)  µ = 50 and σ = 5
B)  µ = 50 and σ = 15
C)  µ = 150 and σ = 5
D)  µ = 150 and σ = 15E) A) and B)
F) A) and C)

Question 9

To calculate the variance for a population, SS is divided by N.

Accepted Answer

A) True 
 B)False

Question 10

A sample of n = 5 scores has ΣX = 20 and ΣX2 = 120.For this sample, what is the value of SS?

Accepted Answer

A)  20
B)  40
C)  100
D)  120E) A) and D)
F) B) and C)

Exam 4: Variability

A positive deviation always indicates a score that is less than the mean.

Correct Answer
verified

A sample of n = 5 scores has ΣX = 20 and ΣX² = 120.For this sample, what is the value of SS?

Correct Answer
verified

For a population of N = 4 scores with $\sum$ X = 10 and $\sum$ X² = 30, SS = 5.

Correct Answer
verified

For a population, a deviation score is computed as X - μ.

Correct Answer
verified

Which of the following symbols identifies the population standard deviation?

Correct Answer
verified

The sum of the squared deviation scores is SS = 20 for a sample of n = 5 scores.What is the variance for this sample?

Correct Answer
verified

Which of the following symbols identifies the sample variance?

Correct Answer
verified

If the population variance is 4, then the standard deviation will be σ = 16.

Correct Answer
verified

A population of scores has µ = 50 and σ = 5.If every score in the population is multiplied by 3, then what are the new values for the mean and standard deviation?

Correct Answer
verified

To calculate the variance for a population, SS is divided by N.

Correct Answer
verified

Exam 4: Variability

A positive deviation always indicates a score that is less than the mean.

Correct AnswerverifiedShow Answer

A sample of n = 5 scores has ΣX = 20 and ΣX2 = 120.For this sample, what is the value of SS?

Correct AnswerverifiedShow Answer

For a population of N = 4 scores with ∑\sum∑ X = 10 and ∑\sum∑ X2 = 30, SS = 5.

Correct AnswerverifiedShow Answer

For a population, a deviation score is computed as X - μ.

Correct AnswerverifiedShow Answer

Which of the following symbols identifies the population standard deviation?

Correct AnswerverifiedShow Answer

The sum of the squared deviation scores is SS = 20 for a sample of n = 5 scores.What is the variance for this sample?

Correct AnswerverifiedShow Answer

Which of the following symbols identifies the sample variance?

Correct AnswerverifiedShow Answer

If the population variance is 4, then the standard deviation will be σ = 16.

Correct AnswerverifiedShow Answer

A population of scores has µ = 50 and σ = 5.If every score in the population is multiplied by 3, then what are the new values for the mean and standard deviation?

Correct AnswerverifiedShow Answer

To calculate the variance for a population, SS is divided by N.

Correct AnswerverifiedShow Answer

Correct Answer
verified

A sample of n = 5 scores has ΣX = 20 and ΣX² = 120.For this sample, what is the value of SS?

Correct Answer
verified

For a population of N = 4 scores with $\sum$ X = 10 and $\sum$ X² = 30, SS = 5.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified