Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

What is the value of SS (sum of squared deviations)for the following population? Population: 2,3,0,5

Accepted Answer

A) 13 
B) 38 
C) 13/4 = 3.25 
D) 38/4 = 9.50 
A) 13 
B) 38 
C) 13/4 = 3.25 
D) 38/4 = 9.50

Question 3

On an exam with a mean of μ = 70,you have a score of X = 65.Which of the following values for the standard deviation would give you the highest position within the class?

Accepted Answer

A) σ = 1 
B) σ = 5 
C) σ = 10 
D) Cannot determine from the information given 
A) σ = 1 
B) σ = 5 
C) σ = 10 
D) Cannot determine from the information given

Question 4

For a sample with M = 20 and s = 4,a score of X = 17 would be considered an extremely low score.

Accepted Answer

A) True 
 B)False

Question 5

The value for SS can never be less than zero.

Accepted Answer

A) True 
 B)False

Question 6

The range is usually considered to be a relatively crude measure of variability.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

A sample of n = 4 scores has ΣX = 8 and ΣX² = 40.What is the value of SS for this sample?

Accepted Answer

A) 6 
B) 8 
C) 24 
D) 40 
A) 6 
B) 8 
C) 24 
D) 40

Question 9

A sample of n = 25 scores is selected from a population with a variance of σ² = 16,and the variance is computed for the sample using n - 1.The sample variance probably will be smaller than 16.

Accepted Answer

A) True 
 B)False

Question 10

A sample of n = 25 scores has M = 20 and s² = 9.What is the sample standard deviation?

Accepted Answer

A) 3 
B) 4.5 
C) 9 
D) 81 
A) 3 
B) 4.5 
C) 9 
D) 81

Question 11

A sample of n = 6 scores has a standard deviation of s = 3.What is the value of SS,the sum of the squared deviations for this sample?

Accepted Answer

A) 54 
B) 45 
C) 18 
D) 15 
A) 54 
B) 45 
C) 18 
D) 15

Question 12

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

Accepted Answer

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

Question 13

If the population variance is 5,then the population standard deviation is σ = 25.

Accepted Answer

A) True 
 B)False

Question 14

Using the definitional formula,compute SS for the following population and then find the population variance and the standard deviation.Scores: 9,4,0,6,1,4

Accepted Answer

SS = 54,Ϭ²

Question 15

What is the variance for the following population of scores? Scores: 5,2,5,4

Accepted Answer

A) 6 
B) 2 
C) 1.5 
D) 1.22 
A) 6 
B) 2 
C) 1.5 
D) 1.22

Question 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?

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 17

For a sample with M = 40 and s = 4,about 95% of the individuals will have scores between X = 32 and X = 48.

Accepted Answer

A) True 
 B)False

Question 18

What is the value of SS (sum of squared deviations)for the following sample? Sample: 1,3,2,2

Accepted Answer

A) 0.50 
B) 2 
C) 4 
D) 18 
A) 0.50 
B) 2 
C) 4 
D) 18

Question 19

For a particular population,the largest distance (deviation)between a score and the mean is 11 points.The smallest distance between a score and the mean is 4 points.Therefore,the standard deviation _____.

Accepted Answer

A) will be less than 4 
B) will be between 4 and 11 
C) will be greater than 11 
D) It is impossible to say anything about the standard deviation. 
A) will be less than 4 
B) will be between 4 and 11 
C) will be greater than 11 
D) It is impossible to say anything about the standard deviation.

Question 20

A sample of n = 6 scores has SS = 30 and s² = 6.If the 6 scores were a population,the value of SS would still be 30,but the variance would be σ² = 5.

Accepted Answer

A) True 
 B)False

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

What is the value of SS (sum of squared deviations)for the following population? Population: 2,3,0,5

On an exam with a mean of μ = 70,you have a score of X = 65.Which of the following values for the standard deviation would give you the highest position within the class?

For a sample with M = 20 and s = 4,a score of X = 17 would be considered an extremely low score.

The value for SS can never be less than zero.

The range is usually considered to be a relatively crude measure of variability.

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

A sample of n = 4 scores has ΣX = 8 and ΣX² = 40.What is the value of SS for this sample?

A sample of n = 25 scores is selected from a population with a variance of σ² = 16,and the variance is computed for the sample using n - 1.The sample variance probably will be smaller than 16.

A sample of n = 25 scores has M = 20 and s² = 9.What is the sample standard deviation?

A sample of n = 6 scores has a standard deviation of s = 3.What is the value of SS,the sum of the squared deviations for this sample?

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

If the population variance is 5,then the population standard deviation is σ = 25.

Using the definitional formula,compute SS for the following population and then find the population variance and the standard deviation.Scores: 9,4,0,6,1,4

What is the variance for the following population of scores? Scores: 5,2,5,4

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 sample with M = 40 and s = 4,about 95% of the individuals will have scores between X = 32 and X = 48.

What is the value of SS (sum of squared deviations)for the following sample? Sample: 1,3,2,2

For a particular population,the largest distance (deviation)between a score and the mean is 11 points.The smallest distance between a score and the mean is 4 points.Therefore,the standard deviation _____.

A sample of n = 6 scores has SS = 30 and s² = 6.If the 6 scores were a population,the value of SS would still be 30,but the variance would be σ² = 5.

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.

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

What is the value of SS (sum of squared deviations)for the following population? Population: 2,3,0,5

On an exam with a mean of μ = 70,you have a score of X = 65.Which of the following values for the standard deviation would give you the highest position within the class?

For a sample with M = 20 and s = 4,a score of X = 17 would be considered an extremely low score.

The value for SS can never be less than zero.

The range is usually considered to be a relatively crude measure of variability.

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

A sample of n = 4 scores has ΣX = 8 and ΣX² = 40.What is the value of SS for this sample?

A sample of n = 25 scores is selected from a population with a variance of σ² = 16,and the variance is computed for the sample using n - 1.The sample variance probably will be smaller than 16.

A sample of n = 25 scores has M = 20 and s² = 9.What is the sample standard deviation?

A sample of n = 6 scores has a standard deviation of s = 3.What is the value of SS,the sum of the squared deviations for this sample?

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

If the population variance is 5,then the population standard deviation is σ = 25.

Using the definitional formula,compute SS for the following population and then find the population variance and the standard deviation.Scores: 9,4,0,6,1,4

What is the variance for the following population of scores? Scores: 5,2,5,4

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 sample with M = 40 and s = 4,about 95% of the individuals will have scores between X = 32 and X = 48.

What is the value of SS (sum of squared deviations)for the following sample? Sample: 1,3,2,2

For a particular population,the largest distance (deviation)between a score and the mean is 11 points.The smallest distance between a score and the mean is 4 points.Therefore,the standard deviation _____.

A sample of n = 6 scores has SS = 30 and s² = 6.If the 6 scores were a population,the value of SS would still be 30,but the variance would be σ² = 5.

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