Question 1

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 2

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 3

All the possible samples of n = 3 scores are selected from a population with F1F1F1S1F1F1F10 = 30 and F1F1F1S1F1F1F10 = 5 and the mean is computed for each of the samples.If the average is calculated for all of the sample means,what value will be obtained?

Accepted Answer

A) 30 
B) Greater than 30 
C) Less than 30 
D) Impossible to predict 
A) 30 
B) Greater than 30 
C) Less than 30 
D) Impossible to predict

Question 4

If a sample of n = 6 scores has F1F1F1S1F1F1F10X = 30 and F1F1F1S1F1F1F10X2 = 200,then SS = 20.

Accepted Answer

A) True 
 B)False

Question 5

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 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

A population has SS = 100 and F1F1F1S1F1F1F102 = 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 8

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 9

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,F1F1F1S1F1F

Question 10

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 11

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 12

Under what circumstances would a score that is 10 points below the mean be considered to be 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 13

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 14

A sample with a variance of 25 has a standard deviation equal to 5 points.

Accepted Answer

A) True 
 B)False

Question 15

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 16

The value for SS can never be less than zero.

Accepted Answer

A) True 
 B)False

Question 17

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 18

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 19

If the highest score in a distribution is X = 16 and the lowest is X = 4,then the range is 12 or 13 points.

Accepted Answer

A) True 
 B)False

Question 20

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

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

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

All the possible samples of n = 3 scores are selected from a population with  = 30 and  = 5 and the mean is computed for each of the samples.If the average is calculated for all of the sample means,what value will be obtained?

If a sample of n = 6 scores has X = 30 and X² = 200,then SS = 20.

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

Which set of scores has the smallest standard deviation?

A population has SS = 100 and ² = 4.How many scores are in the population?

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

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

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?

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.

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

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 with a variance of 25 has a standard deviation equal to 5 points.

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

The value for SS can never be less than zero.

Which of the following is true for most distributions?

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?

If the highest score in a distribution is X = 16 and the lowest is X = 4,then the range is 12 or 13 points.

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

Introduction to Statistics

Frequency Distributions

Measures of Central Tendency

Z-Scores

Probability

Probability and Samples:

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 Anova

Correlation and Regression

Chi-Square Tests

Filters

Exam 4: Measures of Variability

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

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

All the possible samples of n = 3 scores are selected from a population with  = 30 and  = 5 and the mean is computed for each of the samples.If the average is calculated for all of the sample means,what value will be obtained?

If a sample of n = 6 scores has X = 30 and X2 = 200,then SS = 20.

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

Which set of scores has the smallest standard deviation?

A population has SS = 100 and 2 = 4.How many scores are in the population?

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

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

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?

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.

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

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 with a variance of 25 has a standard deviation equal to 5 points.

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

The value for SS can never be less than zero.

Which of the following is true for most distributions?

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?

If the highest score in a distribution is X = 16 and the lowest is X = 4,then the range is 12 or 13 points.

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

Introduction to Statistics

Frequency Distributions

Measures of Central Tendency

Z-Scores

Probability

Probability and Samples:

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 Anova

Correlation and Regression

Chi-Square Tests

Filters

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

If a sample of n = 6 scores has X = 30 and X² = 200,then SS = 20.

A population has SS = 100 and ² = 4.How many scores are in the population?