Question 1

Which of the following statements is true of the sample mean?

Accepted Answer

A)  It systematically overestimates the value of the population mean. 
B)  It systematically underestimates the value of the population mean. 
C)  It cannot be used to estimate the value of the population mean. 
D)  It is an unbiased estimate of the population mean. 
A)  It systematically overestimates the value of the population mean. 
B)  It systematically underestimates the value of the population mean. 
C)  It cannot be used to estimate the value of the population mean. 
D)  It is an unbiased estimate of the population mean.

Question 2

What are the advantages of using the mean as a measure of central tendency?

Accepted Answer

The mean is the only measure of central

Question 3

The mode can be determined for which scales of measurement?

Accepted Answer

A)  nominal 
B)  ordinal 
C)  interval and ratio 
D)  all of the above 
A)  nominal 
B)  ordinal 
C)  interval and ratio 
D)  all of the above

Question 4

Which measure of central tendency is never influenced by extreme scores in the tails of the distribution?

Accepted Answer

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

Question 5

Which of the following statements is true of the median?

Accepted Answer

A)  It takes all score values into consideration. 
B)  It is biased by extreme scores in the distribution. 
C)  It may not be an actual score. 
D)  It is the measure of central tendency used most often in statistics. 
A)  It takes all score values into consideration. 
B)  It is biased by extreme scores in the distribution. 
C)  It may not be an actual score. 
D)  It is the measure of central tendency used most often in statistics.

Question 6

If a distribution is positively skewed, the smallest value will be

Accepted Answer

A)  the mode. 
B)  the median. 
C)  the mean. 
D)  the standard deviation. 
A)  the mode. 
B)  the median. 
C)  the mean. 
D)  the standard deviation.

Question 7

How would you describe the shape of the distribution for the following set of scores: 10, 10, 10, 20, 20, 20, 20, 20, 30, 30, 30, 30, 30, 50, 60, 60, 70, 80?

Accepted Answer

A)  symmetrical 
B)  positively skewed 
C)  negatively skewed 
D)  bimodal 
A)  symmetrical 
B)  positively skewed 
C)  negatively skewed 
D)  bimodal

Question 8

The preferred measure of central tendency in a skewed distribution is

Accepted Answer

A)  the standard deviation. 
B)  the mode. 
C)  the median. 
D)  the mean. 
A)  the standard deviation. 
B)  the mode. 
C)  the median. 
D)  the mean.

Question 9

If a distribution is severely skewed, is the mean or the median the preferred measure of central tendency? Why?

Accepted Answer

If a distribution is severely skewed, th

Question 10

An unscrupulous CEO of a large tech company is recruiting for new hires. The top few executives in the company earn huge salaries, but most of the other employees earn salaries that are quite a bit lower. Since he wants to make a good impression, which measure of central tendency does the CEO report to the potential new hires?

Accepted Answer

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

Question 11

In a negatively skewed distribution, the mean will be

Accepted Answer

A)  towards the low scores. 
B)  towards the high scores. 
C)  in the middle of the distribution. 
D)  between the mode and the median. 
A)  towards the low scores. 
B)  towards the high scores. 
C)  in the middle of the distribution. 
D)  between the mode and the median.

Question 12

Briefly define the following terms:
a. Central tendency
b. Mode
c. Median
d. Mean

Accepted Answer

a. Central tendency: a single value that

Question 13

The symbol "μ" represents

Accepted Answer

A)  the mode. 
B)  the median. 
C)  the sample mean. 
D)  the population mean. 
A)  the mode. 
B)  the median. 
C)  the sample mean. 
D)  the population mean.

Question 14

To determine the mean for a set of scores,

Accepted Answer

A)  start by dividing the distribution of scores in half. 
B)  start by looking for the most common score. 
C)  start by adding up all of the scores in the distribution. 
D)  multiply the sum of the scores by the total number of scores. 
A)  start by dividing the distribution of scores in half. 
B)  start by looking for the most common score. 
C)  start by adding up all of the scores in the distribution. 
D)  multiply the sum of the scores by the total number of scores.

Question 15

A naturalist categorizes plants into different species. Since the categories represent a _______________ scale, the appropriate measure of central tendency would be _______________.

Accepted Answer

A)  ordinal; median 
B)  ordinal; mode 
C)  nominal; mode 
D)  nominal; median 
A)  ordinal; median 
B)  ordinal; mode 
C)  nominal; mode 
D)  nominal; median

Question 16

On the first day of class, a psychology professor gave her abnormal psychology students a 100-point pretest over concepts related to mental illness. The scores were as follows:
 $\begin{array}{llll}
69 & 48 & 41 & 55 \
73 & 59 & 83 & 78 \
82 & 64 & 61 & 84 \
75 & 89 & 72 & 56 \
77 & 66 & 76 & 69 \
80 & 70 & 57 & 80
\end{array}$ a. Construct a grouped frequency distribution.
b. What is the median?
c. What is the mean?

Accepted Answer

None

Question 17

Four people in a sample scored 6; another person scored 8; and one other person scored 10. What is the mean?

Accepted Answer

A)  6 
B)  7 
C)  8 
D)  7.5 
A)  6 
B)  7 
C)  8 
D)  7.5

Question 18

If a distribution is positively skewed, the a) ______________ will have the highest score value and the b) ______________ will have the lowest score value. If a distribution is negatively skewed, the c) ______________ will have the highest score value and the d) ______________ will have the lowest score value.

Accepted Answer

a. mean
b.

Question 19

What is the median for the following set of scores: 14, 11, 16, 11, 9, 18, 12?

Accepted Answer

A)  10 
B)  11 
C)  12 
D)  13 
A)  10 
B)  11 
C)  12 
D)  13

Question 20

The only measure of central tendency that can be used for variables measured on a nominal scale is the

Accepted Answer

A)  mode. 
B)  median. 
C)  mean. 
D)  standard deviation. 
A)  mode. 
B)  median. 
C)  mean. 
D)  standard deviation.

Which of the following statements is true of the sample mean?

What are the advantages of using the mean as a measure of central tendency?

The mode can be determined for which scales of measurement?

Which measure of central tendency is never influenced by extreme scores in the tails of the distribution?

Which of the following statements is true of the median?

If a distribution is positively skewed, the smallest value will be

How would you describe the shape of the distribution for the following set of scores: 10, 10, 10, 20, 20, 20, 20, 20, 30, 30, 30, 30, 30, 50, 60, 60, 70, 80?

The preferred measure of central tendency in a skewed distribution is

If a distribution is severely skewed, is the mean or the median the preferred measure of central tendency? Why?

In a negatively skewed distribution, the mean will be

Briefly define the following terms: a. Central tendency b. Mode c. Median d. Mean

The symbol "μ" represents

To determine the mean for a set of scores,

A naturalist categorizes plants into different species. Since the categories represent a _ scale, the appropriate measure of central tendency would be _.

Four people in a sample scored 6; another person scored 8; and one other person scored 10. What is the mean?

If a distribution is positively skewed, the a) will have the highest score value and the b) will have the lowest score value. If a distribution is negatively skewed, the c) will have the highest score value and the d) will have the lowest score value.

What is the median for the following set of scores: 14, 11, 16, 11, 9, 18, 12?

The only measure of central tendency that can be used for variables measured on a nominal scale is the

Organizing Data Using Tables and Graphs

Measures of Variability

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 3: Measures of Central Tendency

Which of the following statements is true of the sample mean?

What are the advantages of using the mean as a measure of central tendency?

The mode can be determined for which scales of measurement?

Which measure of central tendency is never influenced by extreme scores in the tails of the distribution?

Which of the following statements is true of the median?

If a distribution is positively skewed, the smallest value will be

How would you describe the shape of the distribution for the following set of scores: 10, 10, 10, 20, 20, 20, 20, 20, 30, 30, 30, 30, 30, 50, 60, 60, 70, 80?

The preferred measure of central tendency in a skewed distribution is

If a distribution is severely skewed, is the mean or the median the preferred measure of central tendency? Why?

In a negatively skewed distribution, the mean will be

Briefly define the following terms: a. Central tendency b. Mode c. Median d. Mean

The symbol "μ" represents

To determine the mean for a set of scores,

A naturalist categorizes plants into different species. Since the categories represent a _______________ scale, the appropriate measure of central tendency would be _______________.

Four people in a sample scored 6; another person scored 8; and one other person scored 10. What is the mean?

What is the median for the following set of scores: 14, 11, 16, 11, 9, 18, 12?

The only measure of central tendency that can be used for variables measured on a nominal scale is the

Organizing Data Using Tables and Graphs

Measures of Variability

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

A naturalist categorizes plants into different species. Since the categories represent a _ scale, the appropriate measure of central tendency would be _.