Question 1

What is the variance (s2) for this set of data? 6, 7, 10, 13

Accepted Answer

A)  9.00 
B)  3.16 
C)  10.00 
D)  7.50 
A)  9.00 
B)  3.16 
C)  10.00 
D)  7.50 C

Question 2

College GPAs can range from 0.00 to 4.00. Ben collects GPAs from a sample of students and calculates a standard deviation (s) of 6.13. This most likely implies ______.

Accepted Answer

A)  the distribution of GPAs is bimodal 
B)  there is a great deal of variability in the GPAs of his sample 
C)  he needs to check his calculations 
D)  the distribution of GPAs is symmetrical 
A)  the distribution of GPAs is bimodal 
B)  there is a great deal of variability in the GPAs of his sample 
C)  he needs to check his calculations 
D)  the distribution of GPAs is symmetrical C

Question 3

Which of these is NOT based on all of the scores in a set of data?

Accepted Answer

A)  mean 
B)  standard deviation 
C)  variance 
D)  range 
A)  mean 
B)  standard deviation 
C)  variance 
D)  range D

Question 4

For this set of data,   is equal to ______. 9, 8, 10, 5, 5, 2, 3, 9, 6, 3

Accepted Answer

A)  51 
B)  353 
C)  2601 
D)  26010 
A)  51 
B)  353 
C)  2601 
D)  26010

Question 5

The interquartile range is calculated using 75% of the data set.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is NOT true about the interquartile range?

Accepted Answer

A)  It is less affected by outliers than is the range. 
B)  It consists of using only the middle 50% of the scores in a data set. 
C)  It removes the highest and lowest 25% of the distribution. 
D)  It subtracts the highest score from the lowest score. 
A)  It is less affected by outliers than is the range. 
B)  It consists of using only the middle 50% of the scores in a data set. 
C)  It removes the highest and lowest 25% of the distribution. 
D)  It subtracts the highest score from the lowest score.

Question 7

What is the sum of squared scores   for this set of data? 6.72, 7.13, 8.91, 5.52, 7.23, 8.45

Accepted Answer

A)  43.96 
B)  329.53 
C)  1932.48 
D)  7.33 
A)  43.96 
B)  329.53 
C)  1932.48 
D)  7.33

Question 8

Which of these is NOT affected by outliers?

Accepted Answer

A)  standard deviation 
B)  median 
C)  variance 
D)  mean 
A)  standard deviation 
B)  median 
C)  variance 
D)  mean

Question 9

George calculates a value of -1.87 for the variance (s2) for a set of data. This necessarily implies ______.

Accepted Answer

A)  the distribution of scores is negatively skewed 
B)  there are outliers in the data 
C)  most of the scores are less than the mean 
D)  he needs to check his calculations 
A)  the distribution of scores is negatively skewed 
B)  there are outliers in the data 
C)  most of the scores are less than the mean 
D)  he needs to check his calculations

Question 10

The range is calculated by subtracting the lowest score in a data set from the highest score.

Accepted Answer

A) True 
 B)False

Question 11

What is the interquartile range for this set of data? 50, 78, 64, 39, 97, 88, 43, 47, 73, 41, 56, 84, 67, 72, 92, 59

Accepted Answer

A)  16 
B)  24 
C)  28 
D)  58 
A)  16 
B)  24 
C)  28 
D)  58

Question 12

What is the standard deviation (s) for this set of data? 4, 2, 7, 5, 4, 1

Accepted Answer

A)  4.57 
B)  3.83 
C)  3.14 
D)  2.14 
A)  4.57 
B)  3.83 
C)  3.14 
D)  2.14

Question 13

Compared to the range, the primary purpose of the interquartile range is to represent the variability in a set of data ______.

Accepted Answer

A)  while lessening the influence of outliers 
B)  while increasing the influence of outliers 
C)  using deviations from the mean 
D)  by taking into account all of the scores of a distribution 
A)  while lessening the influence of outliers 
B)  while increasing the influence of outliers 
C)  using deviations from the mean 
D)  by taking into account all of the scores of a distribution

Question 14

For this set of data, the mean   is equal to ______. 85, 101, 280, 580, 880

Accepted Answer

A)  304.88 
B)  340.86 
C)  385.20 
D)  1926.00 
A)  304.88 
B)  340.86 
C)  385.20 
D)  1926.00

Question 15

The ______ measures the ______ of a distribution of scores for a variable.

Accepted Answer

A)  standard deviation; modality 
B)  mode; variability 
C)  mean; modality 
D)  range; symmetry 
A)  standard deviation; modality 
B)  mode; variability 
C)  mean; modality 
D)  range; symmetry

Question 16

Variance (s2) may be defined as ______.

Accepted Answer

A)  the most common or frequently occurring score in a distribution 
B)  the average squared deviation of a score from the mean 
C)  the mathematical average 
D)  the score that splits a distribution into two equal halves 
A)  the most common or frequently occurring score in a distribution 
B)  the average squared deviation of a score from the mean 
C)  the mathematical average 
D)  the score that splits a distribution into two equal halves

Question 17

For this set of data, the standard deviation (s) is equal to ______. 85, 101, 280, 580, 880

Accepted Answer

A)  304.88 
B)  340.86 
C)  385.20 
D)  1926.00 
A)  304.88 
B)  340.86 
C)  385.20 
D)  1926.00

Question 18

What is the variance (s2) for this set of data? 1, 5, 6

Accepted Answer

A)  4.00 
B)  2.65 
C)  7.00 
D)  4.67 
A)  4.00 
B)  2.65 
C)  7.00 
D)  4.67

Question 19

The range is defined as ______.

Accepted Answer

A)  the middle 50% of the scores in a set of data 
B)  the mathematical difference between the lowest and highest scores in a set of data 
C)  average squared deviation from the mean 
D)  average squared deviation of a score from the population mean 
A)  the middle 50% of the scores in a set of data 
B)  the mathematical difference between the lowest and highest scores in a set of data 
C)  average squared deviation from the mean 
D)  average squared deviation of a score from the population mean

Question 20

What is the standard deviation (s) for this set of data? 3.48, 4.60, 3.93, 4.85, 3.15

Accepted Answer

A)  .72 
B)  4.00 
C)  .52 
D)  .65 
A)  .72 
B)  4.00 
C)  .52 
D)  .65

What is the variance (s²) for this set of data? 6, 7, 10, 13

College GPAs can range from 0.00 to 4.00. Ben collects GPAs from a sample of students and calculates a standard deviation (s) of 6.13. This most likely implies ______.

Which of these is NOT based on all of the scores in a set of data?

For this set of data, is equal to ______. 9, 8, 10, 5, 5, 2, 3, 9, 6, 3

The interquartile range is calculated using 75% of the data set.

Which of the following is NOT true about the interquartile range?

What is the sum of squared scores for this set of data? 6.72, 7.13, 8.91, 5.52, 7.23, 8.45

Which of these is NOT affected by outliers?

George calculates a value of -1.87 for the variance (s²) for a set of data. This necessarily implies ______.

The range is calculated by subtracting the lowest score in a data set from the highest score.

What is the interquartile range for this set of data? 50, 78, 64, 39, 97, 88, 43, 47, 73, 41, 56, 84, 67, 72, 92, 59

What is the standard deviation (s) for this set of data? 4, 2, 7, 5, 4, 1

Compared to the range, the primary purpose of the interquartile range is to represent the variability in a set of data ______.

For this set of data, the mean is equal to ______. 85, 101, 280, 580, 880

The measures the of a distribution of scores for a variable.

Variance (s²) may be defined as ______.

For this set of data, the standard deviation (s) is equal to ______. 85, 101, 280, 580, 880

What is the variance (s²) for this set of data? 1, 5, 6

The range is defined as ______.

What is the standard deviation (s) for this set of data? 3.48, 4.60, 3.93, 4.85, 3.15

Introduction to Statistics

Examining Data: Tables and Figures

Measures of Central Tendency

Normal Distributions

Probability and Hypothesis Testing

Testing One Sample Mean

Estimating the Mean of a Population

Testing the Difference Between Two Means

Errors in Hypothesis Testing, Statistical Power, and Effect Size

One-Way Analysis of Variance Anova

Two-Way Analysis of Variance Anova

Correlation

Linear Regression and Multiple Correlation

Chi-Square

Filters

Exam 4: Measures of Variability

What is the variance (s2) for this set of data? 6, 7, 10, 13

College GPAs can range from 0.00 to 4.00. Ben collects GPAs from a sample of students and calculates a standard deviation (s) of 6.13. This most likely implies ______.

Which of these is NOT based on all of the scores in a set of data?

For this set of data, is equal to ______. 9, 8, 10, 5, 5, 2, 3, 9, 6, 3

The interquartile range is calculated using 75% of the data set.

Which of the following is NOT true about the interquartile range?

What is the sum of squared scores for this set of data? 6.72, 7.13, 8.91, 5.52, 7.23, 8.45

Which of these is NOT affected by outliers?

George calculates a value of -1.87 for the variance (s2) for a set of data. This necessarily implies ______.

The range is calculated by subtracting the lowest score in a data set from the highest score.

What is the interquartile range for this set of data? 50, 78, 64, 39, 97, 88, 43, 47, 73, 41, 56, 84, 67, 72, 92, 59

What is the standard deviation (s) for this set of data? 4, 2, 7, 5, 4, 1

Compared to the range, the primary purpose of the interquartile range is to represent the variability in a set of data ______.

For this set of data, the mean is equal to ______. 85, 101, 280, 580, 880

The ______ measures the ______ of a distribution of scores for a variable.

Variance (s2) may be defined as ______.

For this set of data, the standard deviation (s) is equal to ______. 85, 101, 280, 580, 880

What is the variance (s2) for this set of data? 1, 5, 6

The range is defined as ______.

What is the standard deviation (s) for this set of data? 3.48, 4.60, 3.93, 4.85, 3.15

Introduction to Statistics

Examining Data: Tables and Figures

Measures of Central Tendency

Normal Distributions

Probability and Hypothesis Testing

Testing One Sample Mean

Estimating the Mean of a Population

Testing the Difference Between Two Means

Errors in Hypothesis Testing, Statistical Power, and Effect Size

One-Way Analysis of Variance Anova

Two-Way Analysis of Variance Anova

Correlation

Linear Regression and Multiple Correlation

Chi-Square

Filters

What is the variance (s²) for this set of data? 6, 7, 10, 13

George calculates a value of -1.87 for the variance (s²) for a set of data. This necessarily implies ______.

The measures the of a distribution of scores for a variable.

Variance (s²) may be defined as ______.

What is the variance (s²) for this set of data? 1, 5, 6