Question 1

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 2

In a population with a mean of ? = 40 and a standard deviation of ? = 8,a score of X = 46 would be an extreme value,far out in the tail of the distribution.

Accepted Answer

A) True 
 B)False

Question 3

In a population of N = 10 scores,the smallest score is X = 8 and the largest is X = 20.What is the range for this population?

Accepted Answer

A) 8 
B) 10 
C) 12-13 
D) 20 
A) 8 
B) 10 
C) 12-13 
D) 20

Question 4

After a researcher multiplies every score in a sample by 2,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 5

A population of N = 5 scores has ΣX = 20 and ΣX² = 100.For this population,what is the value of SS?

Accepted Answer

A) 20 
B) 80 
C) 100 
D) 380 
A) 20 
B) 80 
C) 100 
D) 380

Question 6

Which set of scores has the smallest standard deviation?

Accepted Answer

A) 11, 17, 31, 53 
B) 5, 11, 42, 22 
C) 145, 143, 145, 147 
D) 27, 105, 10, 80 
A) 11, 17, 31, 53 
B) 5, 11, 42, 22 
C) 145, 143, 145, 147 
D) 27, 105, 10, 80

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

A population has µ = 50 and σ = 5.If 10 points are added to every score in the population,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 = 60 and σ = 5 
D) µ = 60 and σ = 15 
A) µ = 50 and σ = 5 
B) µ = 50 and σ = 15 
C) µ = 60 and σ = 5 
D) µ = 60 and σ = 15

Question 9

Under what circumstances is the computational formula preferred over the definitional formula when computing SS,the sum of the squared deviations,for a sample?

Accepted Answer

A) When the sample mean is a whole number 
B) When the sample mean is not a whole number 
C) When the sample variance is a whole number 
D) When the sample variance is not a whole number 
A) When the sample mean is a whole number 
B) When the sample mean is not a whole number 
C) When the sample variance is a whole number 
D) When the sample variance is not a whole number

Question 10

A sample consists of n = 16 scores.How many of the scores are used to calculate the range?

Accepted Answer

A) 2 
B) 4 
C) 8 
D) All 16 
A) 2 
B) 4 
C) 8 
D) All 16

Question 11

For a population with µ = 60,which of the following values for the population standard deviation would cause X = 68 to have the most extreme position in the distribution?

Accepted Answer

A) σ = 1 
B) σ = 2 
C) σ = 3 
D) σ = 4 
A) σ = 1 
B) σ = 2 
C) σ = 3 
D) σ = 4

Question 12

If the scores in a population range from a low of X = 5 to a high of X = 14,then the population standard deviation must be less than 10 points.

Accepted Answer

A) True 
 B)False

Question 13

A population of N = 6 scores has ΣX = 12 and ΣX² = 54.What is the value of SS for this population?

Accepted Answer

A) 5 
B) 9 
C) 30 
D) 54 
A) 5 
B) 9 
C) 30 
D) 54

Question 14

For a population of scores,the sum of the deviation scores is equal to N.

Accepted Answer

A) True 
 B)False

Question 15

What are the values for SS and variance for the following sample of n = 3 scores? Sample: 1,4,7

Accepted Answer

A) SS = 18 and variance = 6 
B) SS = 18 and variance = 9 
C) SS = 66 and variance = 22 
D) SS = 66 and variance = 33 
A) SS = 18 and variance = 6 
B) SS = 18 and variance = 9 
C) SS = 66 and variance = 22 
D) SS = 66 and variance = 33

Question 16

For a population of N = 4 scores with ΣX = 10 and ΣX² = 30,SS = 5.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

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

Question 18

If you have a score of X = 66 on an exam with µ = 70,you should expect a better grade if σ = 10 than if σ = 5.

Accepted Answer

A) True 
 B)False

Question 19

A population of N = 10 scores has a standard deviation of Ϭ = 2.What is the value of SS,the sum of the squared deviations,for this population?

Accepted Answer

A) 40 
B) 20 
C) 4 
D) 2 
A) 40 
B) 20 
C) 4 
D) 2

Question 20

Which of the following symbols identifies the sample variance?

Accepted Answer

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

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

In a population with a mean of ? = 40 and a standard deviation of ? = 8,a score of X = 46 would be an extreme value,far out in the tail of the distribution.

In a population of N = 10 scores,the smallest score is X = 8 and the largest is X = 20.What is the range for this population?

After a researcher multiplies every score in a sample by 2,the standard deviation is found to be s = 10.The original sample had a standard deviation of s = 5.

A population of N = 5 scores has ΣX = 20 and ΣX² = 100.For this population,what is the value of SS?

Which set of scores has the smallest standard deviation?

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

A population has µ = 50 and σ = 5.If 10 points are added to every score in the population,what are the new values for the mean and standard deviation?

Under what circumstances is the computational formula preferred over the definitional formula when computing SS,the sum of the squared deviations,for a sample?

A sample consists of n = 16 scores.How many of the scores are used to calculate the range?

For a population with µ = 60,which of the following values for the population standard deviation would cause X = 68 to have the most extreme position in the distribution?

If the scores in a population range from a low of X = 5 to a high of X = 14,then the population standard deviation must be less than 10 points.

A population of N = 6 scores has ΣX = 12 and ΣX² = 54.What is the value of SS for this population?

For a population of scores,the sum of the deviation scores is equal to N.

What are the values for SS and variance for the following sample of n = 3 scores? Sample: 1,4,7

For a population of N = 4 scores with ΣX = 10 and ΣX² = 30,SS = 5.

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

If you have a score of X = 66 on an exam with µ = 70,you should expect a better grade if σ = 10 than if σ = 5.

A population of N = 10 scores has a standard deviation of Ϭ = 2.What is the value of SS,the sum of the squared deviations,for this population?

Which of the following symbols identifies the sample variance?

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.

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

In a population with a mean of ? = 40 and a standard deviation of ? = 8,a score of X = 46 would be an extreme value,far out in the tail of the distribution.

In a population of N = 10 scores,the smallest score is X = 8 and the largest is X = 20.What is the range for this population?

After a researcher multiplies every score in a sample by 2,the standard deviation is found to be s = 10.The original sample had a standard deviation of s = 5.

A population of N = 5 scores has ΣX = 20 and ΣX² = 100.For this population,what is the value of SS?

Which set of scores has the smallest standard deviation?

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

A population has µ = 50 and σ = 5.If 10 points are added to every score in the population,what are the new values for the mean and standard deviation?

Under what circumstances is the computational formula preferred over the definitional formula when computing SS,the sum of the squared deviations,for a sample?

A sample consists of n = 16 scores.How many of the scores are used to calculate the range?

For a population with µ = 60,which of the following values for the population standard deviation would cause X = 68 to have the most extreme position in the distribution?

If the scores in a population range from a low of X = 5 to a high of X = 14,then the population standard deviation must be less than 10 points.

A population of N = 6 scores has ΣX = 12 and ΣX² = 54.What is the value of SS for this population?

For a population of scores,the sum of the deviation scores is equal to N.

What are the values for SS and variance for the following sample of n = 3 scores? Sample: 1,4,7

For a population of N = 4 scores with ΣX = 10 and ΣX² = 30,SS = 5.

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

If you have a score of X = 66 on an exam with µ = 70,you should expect a better grade if σ = 10 than if σ = 5.

A population of N = 10 scores has a standard deviation of Ϭ = 2.What is the value of SS,the sum of the squared deviations,for this population?

Which of the following symbols identifies the sample variance?

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