Question 1

When dividing a distribution into four equal parts to determine the IQR, how many quartiles are produced?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
A)  2 
B)  3 
C)  4 
D)  5

Question 2

If we added up all of the deviation scores when calculating the standard deviation, the result would be equal to

Accepted Answer

A)  SS. 
B)  0. 
C)  ∑X. 
D)  ∑X². 
A)  SS. 
B)  0. 
C)  ∑X. 
D)  ∑X².

Question 3

The computational formula for the standard deviation

Accepted Answer

A)  requires the computation of deviation scores. 
B)  is also called the raw score formula. 
C)  involves more calculations that the definitional formula. 
D)  involves more than two columns of numbers. 
A)  requires the computation of deviation scores. 
B)  is also called the raw score formula. 
C)  involves more calculations that the definitional formula. 
D)  involves more than two columns of numbers.

Question 4

If we divided SS by N, the resulting value would be

Accepted Answer

A)  the interquartile range. 
B)  the variance. 
C)  a deviation score. 
D)  the standard deviation. 
A)  the interquartile range. 
B)  the variance. 
C)  a deviation score. 
D)  the standard deviation.

Question 5

The definitional formula for the standard deviation

Accepted Answer

A)  is easier to use than the computational formula. 
B)  requires only two columns. 
C)  is also called the raw score formula. 
D)  requires the computation of deviation scores. 
A)  is easier to use than the computational formula. 
B)  requires only two columns. 
C)  is also called the raw score formula. 
D)  requires the computation of deviation scores.

Question 6

Which of the data sets below shows the greatest amount of variability?

Accepted Answer

A)  1, 2, 3, 4 
B)  6, 6, 6, 6 
C)  7, 9, 11, 13 
D)  2, 6, 12, 20 
A)  1, 2, 3, 4 
B)  6, 6, 6, 6 
C)  7, 9, 11, 13 
D)  2, 6, 12, 20

Question 7

What is the interquartile range for the following set of scores: 6, 8, 10, 12, 12, 12, 14, 15, 16, 16, 17, 17?

Accepted Answer

A)  5 
B)  11 
C)  13 
D)  16 
A)  5 
B)  11 
C)  13 
D)  16

Question 8

A set of scores from a population has a variance of 62. What is the standard deviation?

Accepted Answer

The answer of A set of scores from a population...

Question 9

Which of the following statements is true?

Accepted Answer

A)  The sample mean is a biased estimate of the population mean. 
B)  The sample standard deviation is a biased estimate of the population standard deviation. 
C)  The sample standard deviation is an unbiased estimate of the population standard deviation. 
D)  The sample standard deviation overestimates the population standard deviation. 
A)  The sample mean is a biased estimate of the population mean. 
B)  The sample standard deviation is a biased estimate of the population standard deviation. 
C)  The sample standard deviation is an unbiased estimate of the population standard deviation. 
D)  The sample standard deviation overestimates the population standard deviation.

Question 10

What is the range for the following set of scores: 27, 35, 42, 47, 50?

Accepted Answer

A)  12 
B)  24 
C)  42 
D)  23 
A)  12 
B)  24 
C)  42 
D)  23

Question 11

The following set of scores are from a population: 1, 2, 3, 4, 5. Using the definitional formula, calculate
a. SS.
b. σ²
c. σ

Accepted Answer

a. SS = 10

Question 12

To estimate the population standard deviation from sample data, we should use_________.

Accepted Answer

A)  s 
B)  σ 
C)  σ² 
D)  μ 
A)  s 
B)  σ 
C)  σ² 
D)  μ

Question 13

The high score in a distribution is 54 and the low score is 23. What is the range?

Accepted Answer

A)  30 
B)  31 
C)  32 
D)  33 
A)  30 
B)  31 
C)  32 
D)  33

Question 14

The following scores are from a sample and will be used to estimate the standard deviation for a population: 8, 6, 3, 9, 4. Using the computational formula, calculate the standard deviation.

Accepted Answer

None

Question 15

A set of 10 scores has a sum of squares value of 490. What is the variance?

Accepted Answer

A)  4900 
B)  49 
C)  7 
D)  70 
A)  4900 
B)  49 
C)  7 
D)  70

Question 16

The middle 50% of a normal distribution is best described by the

Accepted Answer

A)  IQR. 
B)  R. 
C)  σ 
D)  s. 
A)  IQR. 
B)  R. 
C)  σ 
D)  s.

Question 17

The measure of variability that does not consider values of the highest or the lowest scores is the

Accepted Answer

A)  range. 
B)  interquartile range. 
C)  standard deviation. 
D)  median. 
A)  range. 
B)  interquartile range. 
C)  standard deviation. 
D)  median.

Question 18

The point at or below which _________ of the scores lie is used in calculating the interquartile range.

Accepted Answer

A)  10% 
B)  25% 
C)  50% 
D)  90% 
A)  10% 
B)  25% 
C)  50% 
D)  90%

Question 19

A set of 10 scores has a standard deviation of 8. What is the sum of squares?

Accepted Answer

A)  80 
B)  .80 
C)  640 
D)  64 
A)  80 
B)  .80 
C)  640 
D)  64

Question 20

Deviation scores are obtained by

Accepted Answer

A)  subtracting the mean from the raw scores. 
B)  subtracting the raw scores from the mean. 
C)  dividing SS by N. 
D)  obtaining the square root of the variance. 
A)  subtracting the mean from the raw scores. 
B)  subtracting the raw scores from the mean. 
C)  dividing SS by N. 
D)  obtaining the square root of the variance.

When dividing a distribution into four equal parts to determine the IQR, how many quartiles are produced?

If we added up all of the deviation scores when calculating the standard deviation, the result would be equal to

The computational formula for the standard deviation

If we divided SS by N, the resulting value would be

The definitional formula for the standard deviation

Which of the data sets below shows the greatest amount of variability?

What is the interquartile range for the following set of scores: 6, 8, 10, 12, 12, 12, 14, 15, 16, 16, 17, 17?

A set of scores from a population has a variance of 62. What is the standard deviation?

Which of the following statements is true?

What is the range for the following set of scores: 27, 35, 42, 47, 50?

The following set of scores are from a population: 1, 2, 3, 4, 5. Using the definitional formula, calculate a. SS. b. σ² c. σ

To estimate the population standard deviation from sample data, we should use_________.

The high score in a distribution is 54 and the low score is 23. What is the range?

The following scores are from a sample and will be used to estimate the standard deviation for a population: 8, 6, 3, 9, 4. Using the computational formula, calculate the standard deviation.

A set of 10 scores has a sum of squares value of 490. What is the variance?

The middle 50% of a normal distribution is best described by the

The measure of variability that does not consider values of the highest or the lowest scores is the

The point at or below which _________ of the scores lie is used in calculating the interquartile range.

A set of 10 scores has a standard deviation of 8. What is the sum of squares?

Deviation scores are obtained by

Organizing Data Using Tables and Graphs

Measures of Central Tendency

Z-Scores and Other Standard Scores

Probability and the Normal Distribution

Sampling Distribution of Means

Hypothesis Testing

One-Sample T-Test

Two-Sample T-Test: Independent Samples Design

Two-Sample T-Test: Related Samples Design

Confidence Interval Versus Point Estimation

One-Way Analysis of Variance

Factorial Analysis of Variance

Correlation and Regression

Chi-Square

Introduction to Statistics

Nonparametric Statistics for Ordinal Data

Filters

Exam 4: Measures of Variability

When dividing a distribution into four equal parts to determine the IQR, how many quartiles are produced?

If we added up all of the deviation scores when calculating the standard deviation, the result would be equal to

The computational formula for the standard deviation

If we divided SS by N, the resulting value would be

The definitional formula for the standard deviation

Which of the data sets below shows the greatest amount of variability?

What is the interquartile range for the following set of scores: 6, 8, 10, 12, 12, 12, 14, 15, 16, 16, 17, 17?

A set of scores from a population has a variance of 62. What is the standard deviation?

Which of the following statements is true?

What is the range for the following set of scores: 27, 35, 42, 47, 50?

The following set of scores are from a population: 1, 2, 3, 4, 5. Using the definitional formula, calculate a. SS. b. σ² c. σ

To estimate the population standard deviation from sample data, we should use_________.

The high score in a distribution is 54 and the low score is 23. What is the range?

The following scores are from a sample and will be used to estimate the standard deviation for a population: 8, 6, 3, 9, 4. Using the computational formula, calculate the standard deviation.

A set of 10 scores has a sum of squares value of 490. What is the variance?

The middle 50% of a normal distribution is best described by the

The measure of variability that does not consider values of the highest or the lowest scores is the

The point at or below which _________ of the scores lie is used in calculating the interquartile range.

A set of 10 scores has a standard deviation of 8. What is the sum of squares?

Deviation scores are obtained by

Organizing Data Using Tables and Graphs

Measures of Central Tendency

Z-Scores and Other Standard Scores

Probability and the Normal Distribution

Sampling Distribution of Means

Hypothesis Testing

One-Sample T-Test

Two-Sample T-Test: Independent Samples Design

Two-Sample T-Test: Related Samples Design

Confidence Interval Versus Point Estimation

One-Way Analysis of Variance

Factorial Analysis of Variance

Correlation and Regression

Chi-Square

Introduction to Statistics

Nonparametric Statistics for Ordinal Data

Filters