Question 1

The root mean square is another name for the

Accepted Answer

A)  standard deviation. 
B)  variance. 
C)  crude range. 
D)  interquartile range. 
A)  standard deviation. 
B)  variance. 
C)  crude range. 
D)  interquartile range. A

Question 2

Which of the following formulae is used in the computation of the confidence interval for the mean?

Accepted Answer

A)  $\sqrt { \frac { ( X - M ) ^ { 2 } } { N } }$ 
B)  $\frac { X - M } { \sigma }$ 
C)  $M \pm \frac { \left( t _ { .05 } \right) ( S ) } { \sqrt { N } }$ 
D)  $\frac { \sum ( X - M ) ^ { 2 } } { N }$ 
A)  $\sqrt { \frac { ( X - M ) ^ { 2 } } { N } }$ 
B)  $\frac { X - M } { \sigma }$ 
C)  $M \pm \frac { \left( t _ { .05 } \right) ( S ) } { \sqrt { N } }$ 
D)  $\frac { \sum ( X - M ) ^ { 2 } } { N }$ C

Question 3

A visual display that preserves the original numbers while still providing a visual summary of the data is the

Accepted Answer

A)  frequency polygon. 
B)  stem-and-leaf chart. 
C)  histogram. 
D)  frequency distribution. 
A)  frequency polygon. 
B)  stem-and-leaf chart. 
C)  histogram. 
D)  frequency distribution. B

Question 4

In order to describe the typical score, Shellie sums all of the scores and divides that number by the number of scores. Which measure of central tendency has Shellie calculated?

Accepted Answer

A)  mode 
B)  median 
C)  arithmetic mean 
D)  mean square 
A)  mode 
B)  median 
C)  arithmetic mean 
D)  mean square

Question 5

An instructor administers an exam to a psychology class. The mean exam grade was 80, with a standard deviation of 10. Supposing you receive a score of 95, what is your z score?

Accepted Answer

A)  -1.5 
B)  -.5 
C)  +.5 
D)  +1.5 
A)  -1.5 
B)  -.5 
C)  +.5 
D)  +1.5

Question 6

Judy subtracts each score from the mean, squares each value, and then determines the mean of these squared values. Which measure of spread is Judy calculating?

Accepted Answer

A)  the interquartile range 
B)  the crude range 
C)  the standard deviation 
D)  the variance 
A)  the interquartile range 
B)  the crude range 
C)  the standard deviation 
D)  the variance

Question 7

The measure of central tendency that is determined by identifying the midmost score in a data set is the

Accepted Answer

A)  mean. 
B)  mode. 
C)  percentile. 
D)  median. 
A)  mean. 
B)  mode. 
C)  percentile. 
D)  median.

Question 8

Describe the three essential criteria for ensuring graphical integrity when visually displaying one's data.

Accepted Answer

The three essential criteria for ensurin

Question 9

What does the variance represent? How is this related to the standard deviation?

Accepted Answer

The variance is a statistical measure th

Question 10

Why is it important to report the spread of the data along with the central tendency when describing a data set?

Accepted Answer

Reporting the spread of the data along w

Question 11

Which measure of central tendency is most affected by outliers?

Accepted Answer

A)  range 
B)  median 
C)  mode 
D)  mean 
A)  range 
B)  median 
C)  mode 
D)  mean

Question 12

An index for reporting the proportion of N scores falling on the mode might be as a subscript (in parentheses) of the mode. The name for this index is

Accepted Answer

A)  modal representativeness index. 
B)  infinite. 
C)  precision index. 
D)  abscissa index. 
A)  modal representativeness index. 
B)  infinite. 
C)  precision index. 
D)  abscissa index.

Question 13

When is it appropriate to use the inferential formula when calculating the variance rather than the descriptive formula?

Accepted Answer

The choice between using the inferential

Question 14

Which of the following is NOT a measure of central tendency?

Accepted Answer

A)  mode 
B)  variance 
C)  median 
D)  mean 
A)  mode 
B)  variance 
C)  median 
D)  mean

Question 15

What is the benefit of looking at the overall pattern of the data? Describe one method for visualizing the data.

Accepted Answer

Looking at the overall pattern of the da

Question 16

A __________ z score is above the mean, while a __________ z score is below the mean.

Accepted Answer

A)  negative; positive 
B)  positive; negative 
C)  positive; zero 
D)  zero; negative 
A)  negative; positive 
B)  positive; negative 
C)  positive; zero 
D)  zero; negative

Question 17

A professor is interested in the overall pattern of the scores from an exam he recently gave. Which of the following would be most useful to him?

Accepted Answer

A)  the mean exam score 
B)  the frequency distribution of the exam scores 
C)  the range of the exam scores 
D)  the variance of the exam scores 
A)  the mean exam score 
B)  the frequency distribution of the exam scores 
C)  the range of the exam scores 
D)  the variance of the exam scores

Question 18

Data sets that contain two scores that occur with the highest frequency are considered to be

Accepted Answer

A)  symmetrical. 
B)  asymmetrical. 
C)  bimodal. 
D)  normal. 
A)  symmetrical. 
B)  asymmetrical. 
C)  bimodal. 
D)  normal.

Question 19

Using an index for reporting the proportion of N scores falling on the mode, a mode having 10 scores of "4" out of 50 possible scores falling on the mode would be annotated as

Accepted Answer

A)  4(.20). 
B)  4(50). 
C)  µ. 
D) 10(4) 
A)  4(.20). 
B)  4(50). 
C)  µ. 
D) 10(4)

Question 20

As he calculates the measures of central tendency for his data set, Andrew notices the mean is substantially higher than the median. Andrew concludes that the distribution is most likely

Accepted Answer

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

The root mean square is another name for the

Which of the following formulae is used in the computation of the confidence interval for the mean?

A visual display that preserves the original numbers while still providing a visual summary of the data is the

In order to describe the typical score, Shellie sums all of the scores and divides that number by the number of scores. Which measure of central tendency has Shellie calculated?

An instructor administers an exam to a psychology class. The mean exam grade was 80, with a standard deviation of 10. Supposing you receive a score of 95, what is your z score?

Judy subtracts each score from the mean, squares each value, and then determines the mean of these squared values. Which measure of spread is Judy calculating?

The measure of central tendency that is determined by identifying the midmost score in a data set is the

Describe the three essential criteria for ensuring graphical integrity when visually displaying one's data.

What does the variance represent? How is this related to the standard deviation?

Why is it important to report the spread of the data along with the central tendency when describing a data set?

Which measure of central tendency is most affected by outliers?

An index for reporting the proportion of N scores falling on the mode might be as a subscript (in parentheses) of the mode. The name for this index is

When is it appropriate to use the inferential formula when calculating the variance rather than the descriptive formula?

Which of the following is NOT a measure of central tendency?

What is the benefit of looking at the overall pattern of the data? Describe one method for visualizing the data.

A z score is above the mean, while a z score is below the mean.

A professor is interested in the overall pattern of the scores from an exam he recently gave. Which of the following would be most useful to him?

Data sets that contain two scores that occur with the highest frequency are considered to be

Using an index for reporting the proportion of N scores falling on the mode, a mode having 10 scores of "4" out of 50 possible scores falling on the mode would be annotated as

As he calculates the measures of central tendency for his data set, Andrew notices the mean is substantially higher than the median. Andrew concludes that the distribution is most likely

Behavioral Research and the Scientific Method

From Hunches to Testable Hypotheses

Ethical Considerations and Guidelines

Carpenter, S 1998 Content Analysis Project for Research Novices Teaching of Psychology

Methods for Looking Within Ourselves

Reliability and Validity in Measurement and Research

Randomized Experiments and Causal Inference

Nonrandomized Research and Causal Reasoning

Survey Research and Subject Recruitment

Correlating Variables

Understanding P Values and Effect Size Indicators

The Comparison of Two Conditions

Comparisons of More Than Two Conditions

The Analysis of Frequency Tables

Filters

Exam 10: Summarizing the Data

The root mean square is another name for the

Which of the following formulae is used in the computation of the confidence interval for the mean?

A visual display that preserves the original numbers while still providing a visual summary of the data is the

In order to describe the typical score, Shellie sums all of the scores and divides that number by the number of scores. Which measure of central tendency has Shellie calculated?

An instructor administers an exam to a psychology class. The mean exam grade was 80, with a standard deviation of 10. Supposing you receive a score of 95, what is your z score?

Judy subtracts each score from the mean, squares each value, and then determines the mean of these squared values. Which measure of spread is Judy calculating?

The measure of central tendency that is determined by identifying the midmost score in a data set is the

Describe the three essential criteria for ensuring graphical integrity when visually displaying one's data.

What does the variance represent? How is this related to the standard deviation?

Why is it important to report the spread of the data along with the central tendency when describing a data set?

Which measure of central tendency is most affected by outliers?

An index for reporting the proportion of N scores falling on the mode might be as a subscript (in parentheses) of the mode. The name for this index is

When is it appropriate to use the inferential formula when calculating the variance rather than the descriptive formula?

Which of the following is NOT a measure of central tendency?

What is the benefit of looking at the overall pattern of the data? Describe one method for visualizing the data.

A __________ z score is above the mean, while a __________ z score is below the mean.

A professor is interested in the overall pattern of the scores from an exam he recently gave. Which of the following would be most useful to him?

Data sets that contain two scores that occur with the highest frequency are considered to be

Using an index for reporting the proportion of N scores falling on the mode, a mode having 10 scores of "4" out of 50 possible scores falling on the mode would be annotated as

As he calculates the measures of central tendency for his data set, Andrew notices the mean is substantially higher than the median. Andrew concludes that the distribution is most likely

Behavioral Research and the Scientific Method

From Hunches to Testable Hypotheses

Ethical Considerations and Guidelines

Carpenter, S 1998 Content Analysis Project for Research Novices Teaching of Psychology

Methods for Looking Within Ourselves

Reliability and Validity in Measurement and Research

Randomized Experiments and Causal Inference

Nonrandomized Research and Causal Reasoning

Survey Research and Subject Recruitment

Correlating Variables

Understanding P Values and Effect Size Indicators

The Comparison of Two Conditions

Comparisons of More Than Two Conditions

The Analysis of Frequency Tables

Filters

A z score is above the mean, while a z score is below the mean.