Question 1

Which of the following symbols identifies the sample variance?

Accepted Answer

A) s 
B) s2 
C) σ 
D) σ 2 
A) s 
B) s2 
C) σ 
D) σ 2

Question 2

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) 100 
A) 4 
B) 5 
C) 80 
D) 100

Question 3

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

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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) 120 
A) 20 
B) 40 
C) 100 
D) 120

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Which of the following symbols identifies the population standard deviation?

Accepted Answer

A) s 
B) s2 
C) σ 
D) σ 2 
A) s 
B) s2 
C) σ 
D) σ 2

Which of the following symbols identifies the sample variance?

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

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

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

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?

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

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

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

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

Which of the following symbols identifies the population standard deviation?

Introduction to Statistics

Frequency Distributions

Central Tendency

Z-Scores

Probability

The Distribution of Sample Means

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

Exam 4: Variability

Which of the following symbols identifies the sample variance?

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

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

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

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?

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

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

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

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

Which of the following symbols identifies the population standard deviation?

Introduction to Statistics

Frequency Distributions

Central Tendency

Z-Scores

Probability

The Distribution of Sample Means

Introduction to Hypothesis Testing

Introduction to the T Statistic

The T Test for Two Independent Samples

The T Test for Two Related Samples

Introduction to Analysis of Variance

Repeated-Measures Anova

Two-Factor Analysis of Variance

Correlation

Introduction to Regression

Chi-Square Tests

The Binomial Test

Choosing the Right Statistics

Filters

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

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