Question 1

What is the value of SS (sum of squared deviations)for the following population? Population: 1,1,1,5

Accepted Answer

A) 3 
B) 7 
C) 12 
D) 28 
A) 3 
B) 7 
C) 12 
D) 28

Question 2

Compute SS,variance and standard deviation for the following population.Scores: 1,3,9,3

Accepted Answer

SS = 36,Ϭ²

Question 3

To calculate the variance for a sample,SS is divided by df = n - 1.

Accepted Answer

A) True 
 B)False

Question 4

If sample variance is computed by dividing SS by df = n - 1,then the average value of the sample variances from all possible random samples will be _______ the population variance.

Accepted Answer

A) smaller than 
B) larger than 
C) approximately equal to 
D) unrelated to 
A) smaller than 
B) larger than 
C) approximately equal to 
D) unrelated to

Question 5

After a researcher adds 5 points to every score in a sample,the standard deviation is found to be s = 10.The original sample had a standard deviation of s = 5.

Accepted Answer

A) True 
 B)False

Question 6

A population has SS = 100 and Ϭ² = 4.What is the value of Σ(X - µ)for the population?

Accepted Answer

A) 0 
B) 25 
C) 100 
D) 400 
A) 0 
B) 25 
C) 100 
D) 400

Question 7

What are the values for SS and variance for the following sample of n = 4 scores? Sample: 1,1,0,4

Accepted Answer

A) SS = 9 and variance = 3 
B) SS = 9 and variance = 2.25 
C) SS = 18 and variance = 6 
D) SS = 18 and variance = 9 
A) SS = 9 and variance = 3 
B) SS = 9 and variance = 2.25 
C) SS = 18 and variance = 6 
D) SS = 18 and variance = 9

Question 8

A population has SS = 100 and Ϭ² = 4.How many scores are in the population?

Accepted Answer

A) 25 
B) 26 
C) 200 
D) 400 
A) 25 
B) 26 
C) 200 
D) 400

Question 9

If a sample of n = 6 scores has ΣX = 30 and ΣX² = 200,then SS = 20.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is true for most distributions?

Accepted Answer

A) Around 30% of the scores will be located within one standard deviation of the mean. 
B) Around 50% of the scores will be located within one standard deviation of the mean. 
C) Around 70% of the scores will be located within one standard deviation of the mean. 
D) Around 90% of the scores will be located within one standard deviation of the mean. 
A) Around 30% of the scores will be located within one standard deviation of the mean. 
B) Around 50% of the scores will be located within one standard deviation of the mean. 
C) Around 70% of the scores will be located within one standard deviation of the mean. 
D) Around 90% of the scores will be located within one standard deviation of the mean.

Question 11

What is the value of SS for the following set of scores? Scores: 8,3,1.

Accepted Answer

A) 26 
B) 29 
C) 74 
D) 144 
A) 26 
B) 29 
C) 74 
D) 144

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is a consequence of increasing variability?

Accepted Answer

A) The distance from one score to another tends to increase, and a single score tends to provide a more accurate representation of the entire distribution. 
B) The distance from one score to another tends to increase, and a single score tends to provide a less accurate representation of the entire distribution. 
C) The distance from one score to another tends to decrease, and a single score tends to provide a more accurate representation of the entire distribution. 
D) The distance from one score to another tends to decrease, and a single score tends to provide a less accurate representation of the entire distribution. 
A) The distance from one score to another tends to increase, and a single score tends to provide a more accurate representation of the entire distribution. 
B) The distance from one score to another tends to increase, and a single score tends to provide a less accurate representation of the entire distribution. 
C) The distance from one score to another tends to decrease, and a single score tends to provide a more accurate representation of the entire distribution. 
D) The distance from one score to another tends to decrease, and a single score tends to provide a less accurate representation of the entire distribution.

Question 14

Under what circumstances would a score that is 10 points below the mean be considered an extreme value?

Accepted Answer

A) When the mean is much greater than 10 
B) When the mean is much less than 10 
C) When the standard deviation is much greater than 10 
D) When the standard deviation is much less than 10 
A) When the mean is much greater than 10 
B) When the mean is much less than 10 
C) When the standard deviation is much greater than 10 
D) When the standard deviation is much less than 10

Question 15

The range and the standard deviation are both measures of distance.

Accepted Answer

A) True 
 B)False

Question 16

A sample of n = 8 scores has SS = 50.If these same scores were a population,then the SS for the population would be _____.

Accepted Answer

A) 50 
B) greater than 50 
C) less than 50 
D) impossible to determine without additional information 
A) 50 
B) greater than 50 
C) less than 50 
D) impossible to determine without additional information

Question 17

What is the range for the following set of scores? Scores: 5,7,9,15

Accepted Answer

A) 4 points 
B) 5 points 
C) 10 or 11 points 
D) 15 points 
A) 4 points 
B) 5 points 
C) 10 or 11 points 
D) 15 points

Question 18

A set of 10 scores has SS = 90.If the scores are a sample,the sample variance is ____,and if the scores are a population,the population variance is ____.

Accepted Answer

A) s2 = 9; ?2 = 9 
B) s2 = 9; ?2 = 10 
C) s2 = 10; ?2 = 9 
D) s2 = 10; ?2 = 10 
A) s2 = 9; ?2 = 9 
B) s2 = 9; ?2 = 10 
C) s2 = 10; ?2 = 9 
D) s2 = 10; ?2 = 10

Question 19

A population with SS = 90 and a variance of 9 has N = 10 scores.

Accepted Answer

A) True 
 B)False

Question 20

For the following scores,which of the following actions will increase the range? Scores: 3,7,10,15

Accepted Answer

A) Subtract 3 points from the score X = 3 
B) Subtract 3 points from the score X = 7 
C) Subtract 3 points from the score X = 10 
D) Subtract 3 points from the score X = 15 
A) Subtract 3 points from the score X = 3 
B) Subtract 3 points from the score X = 7 
C) Subtract 3 points from the score X = 10 
D) Subtract 3 points from the score X = 15

What is the value of SS (sum of squared deviations)for the following population? Population: 1,1,1,5

Compute SS,variance and standard deviation for the following population.Scores: 1,3,9,3

To calculate the variance for a sample,SS is divided by df = n - 1.

If sample variance is computed by dividing SS by df = n - 1,then the average value of the sample variances from all possible random samples will be _______ the population variance.

After a researcher adds 5 points to every score in a sample,the standard deviation is found to be s = 10.The original sample had a standard deviation of s = 5.

A population has SS = 100 and Ϭ² = 4.What is the value of Σ(X - µ)for the population?

What are the values for SS and variance for the following sample of n = 4 scores? Sample: 1,1,0,4

A population has SS = 100 and Ϭ² = 4.How many scores are in the population?

If a sample of n = 6 scores has ΣX = 30 and ΣX² = 200,then SS = 20.

Which of the following is true for most distributions?

What is the value of SS for the following set of scores? Scores: 8,3,1.

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

Which of the following is a consequence of increasing variability?

Under what circumstances would a score that is 10 points below the mean be considered an extreme value?

The range and the standard deviation are both measures of distance.

A sample of n = 8 scores has SS = 50.If these same scores were a population,then the SS for the population would be _____.

What is the range for the following set of scores? Scores: 5,7,9,15

A set of 10 scores has SS = 90.If the scores are a sample,the sample variance is ,and if the scores are a population,the population variance is .

A population with SS = 90 and a variance of 9 has N = 10 scores.

For the following scores,which of the following actions will increase the range? Scores: 3,7,10,15

Introduction to Statistics.

Frequency Distributions.

Central Tendency.

z-Scores: Location of Scores and Standardized Distributions.

Probability.

Probability and Samples: 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 and Two-Factor Analysis of Variance

Correlation and Regression.

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

Filters

Exam 4: Variability.

What is the value of SS (sum of squared deviations)for the following population? Population: 1,1,1,5

Compute SS,variance and standard deviation for the following population.Scores: 1,3,9,3

To calculate the variance for a sample,SS is divided by df = n - 1.

If sample variance is computed by dividing SS by df = n - 1,then the average value of the sample variances from all possible random samples will be _______ the population variance.

After a researcher adds 5 points to every score in a sample,the standard deviation is found to be s = 10.The original sample had a standard deviation of s = 5.

A population has SS = 100 and Ϭ² = 4.What is the value of Σ(X - µ)for the population?

What are the values for SS and variance for the following sample of n = 4 scores? Sample: 1,1,0,4

A population has SS = 100 and Ϭ² = 4.How many scores are in the population?

If a sample of n = 6 scores has ΣX = 30 and ΣX² = 200,then SS = 20.

Which of the following is true for most distributions?

What is the value of SS for the following set of scores? Scores: 8,3,1.

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

Which of the following is a consequence of increasing variability?

Under what circumstances would a score that is 10 points below the mean be considered an extreme value?

The range and the standard deviation are both measures of distance.

A sample of n = 8 scores has SS = 50.If these same scores were a population,then the SS for the population would be _____.

What is the range for the following set of scores? Scores: 5,7,9,15

A set of 10 scores has SS = 90.If the scores are a sample,the sample variance is ____,and if the scores are a population,the population variance is ____.

A population with SS = 90 and a variance of 9 has N = 10 scores.

For the following scores,which of the following actions will increase the range? Scores: 3,7,10,15

Introduction to Statistics.

Frequency Distributions.

Central Tendency.

z-Scores: Location of Scores and Standardized Distributions.

Probability.

Probability and Samples: 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 and Two-Factor Analysis of Variance

Correlation and Regression.

The Chi-Square Statistic: Tests for Goodness of Fit and Independence

Filters

A set of 10 scores has SS = 90.If the scores are a sample,the sample variance is ,and if the scores are a population,the population variance is .