Question 1

When we plot a histogram, the values on the X axis are

Accepted Answer

A)  the real lower limits and real upper limits 
B)  the midpoints 
C)  the integers closest to the boundaries. 
D)  any of the above, depending on what makes the most sense at the time 
A)  the real lower limits and real upper limits 
B)  the midpoints 
C)  the integers closest to the boundaries. 
D)  any of the above, depending on what makes the most sense at the time

Question 2

To get an accurate idea about the shape of a distribution,

Accepted Answer

A)  relatively large samples of data are needed. 
B)  computer programs are needed. 
C)  three-dimensional plots are usually helpful. 
D)  stem-and-leaf displays are the only accurate methods of presentation. 
A)  relatively large samples of data are needed. 
B)  computer programs are needed. 
C)  three-dimensional plots are usually helpful. 
D)  stem-and-leaf displays are the only accurate methods of presentation.

Question 3

The real lower limit and the real upper limit of the interval 40-49 are

Accepted Answer

A)  39.5 and 49.5. 
B)  40 and 49. 
C)  40 and 50. 
D)  39 and 50. 
A)  39.5 and 49.5. 
B)  40 and 49. 
C)  40 and 50. 
D)  39 and 50.

Question 4

A frequency distribution

Accepted Answer

A)  displays the average of each score received. 
B)  offers no more information than a collection of raw data. 
C)  counts the number of times each score is received. 
D)  does none of the above. 
A)  displays the average of each score received. 
B)  offers no more information than a collection of raw data. 
C)  counts the number of times each score is received. 
D)  does none of the above.

Question 5

Assume that you have a set of data with 70 values spread fairly evenly between 0 and 100. The optimal number of categories for a histogram of these data would be approximately

Accepted Answer

A)  4 
B)  10 
C)  25 
D)  50 
A)  4 
B)  10 
C)  25 
D)  50

Question 6

When a variable has many values, and each value occurs rarely, a stem-and-leaf plot is preferable to a histogram.

Accepted Answer

A) True 
 B)False

Question 7

In a frequency distribution, the number of observations that fall within an interval is plotted.

Accepted Answer

A) True 
 B)False

Question 8

The following graphic is adapted from one in Wainer (1984), plotting the number of private and public elementary schools (in thousands) in the U.S. between 1930 and 1970. Wainer was presenting it as a bad example, and I have made it worse. What is bad about this example?
 
​

Accepted Answer

A)  The three dimensional effect only makes the graph harder to read. 
B)  Any change in the number of private schools is difficult to see. 
C)  The time intervals on the abscissa are too broad. 
D)  a and b but not c 
A)  The three dimensional effect only makes the graph harder to read. 
B)  Any change in the number of private schools is difficult to see. 
C)  The time intervals on the abscissa are too broad. 
D)  a and b but not c

Question 9

The following is a frequency distribution. 
​

Accepted Answer

A) True 
 B)False

Question 10

The next six questions are based on the following data.  
-Where do the data tend to cluster?

Accepted Answer

The data t

Question 11

In the text there was a stem-and-leaf display showing the performance of students who attended class regularly and those who often skipped class. This display illustrated

Accepted Answer

A)  that poor attendees did more poorly than good attendees. 
B)  the shape of the two distributions. 
C)  the dispersion of the two distributions. 
D)  all of the above 
A)  that poor attendees did more poorly than good attendees. 
B)  the shape of the two distributions. 
C)  the dispersion of the two distributions. 
D)  all of the above

Question 12

In the above data set, the outliers would most likely be

Accepted Answer

A)  94 and 99. 
B)  36 and 99. 
C)  36 and 42. 
D)  There are no outliers. 
A)  94 and 99. 
B)  36 and 99. 
C)  36 and 42. 
D)  There are no outliers.

Question 13

The "real lower limit" of an interval in a histogram is

Accepted Answer

A)  the lowest integer value for scores in that interval. 
B)  the midpoint of the interval. 
C)  the lowest continuous value that would be rounded up into that interval. 
D)  the smallest width of the interval. 
A)  the lowest integer value for scores in that interval. 
B)  the midpoint of the interval. 
C)  the lowest continuous value that would be rounded up into that interval. 
D)  the smallest width of the interval.

Question 14

Kurtosis is

Accepted Answer

A)  the constant in the midpoint equation when graphing histograms. 
B)  a little-used measure of the shape of a distribution. 
C)  a computer graphics program. 
D)  a disease common to people named Kurt. 
A)  the constant in the midpoint equation when graphing histograms. 
B)  a little-used measure of the shape of a distribution. 
C)  a computer graphics program. 
D)  a disease common to people named Kurt.

Question 15

Which of the following distributions can be symmetric?

Accepted Answer

A)  unimodal 
B)  bimodal 
C)  normal 
D)  all of the above 
A)  unimodal 
B)  bimodal 
C)  normal 
D)  all of the above

Question 16

Given the following numbers, 10, 25, 37, and 40, the leading digits are 1, 2, 3, and 4.

Accepted Answer

A) True 
 B)False

Question 17

The next six questions are based on the following data.  
-Create a stem and leaf plot for these data.

Accepted Answer

Sample ste

When we plot a histogram, the values on the X axis are

To get an accurate idea about the shape of a distribution,

The real lower limit and the real upper limit of the interval 40-49 are

A frequency distribution

Assume that you have a set of data with 70 values spread fairly evenly between 0 and 100. The optimal number of categories for a histogram of these data would be approximately

When a variable has many values, and each value occurs rarely, a stem-and-leaf plot is preferable to a histogram.

In a frequency distribution, the number of observations that fall within an interval is plotted.

The following graphic is adapted from one in Wainer (1984), plotting the number of private and public elementary schools (in thousands) in the U.S. between 1930 and 1970. Wainer was presenting it as a bad example, and I have made it worse. What is bad about this example?

The following is a frequency distribution.

The next six questions are based on the following data. -Where do the data tend to cluster?

In the text there was a stem-and-leaf display showing the performance of students who attended class regularly and those who often skipped class. This display illustrated

In the above data set, the outliers would most likely be

The "real lower limit" of an interval in a histogram is

Kurtosis is

Which of the following distributions can be symmetric?

Given the following numbers, 10, 25, 37, and 40, the leading digits are 1, 2, 3, and 4.

The next six questions are based on the following data. -Create a stem and leaf plot for these data.

Introduction

Basic Concepts

Measures of Central Tendency

Measures of Variability

The Normal Distribution

Basic Concepts of Probability

Sampling Distributions and Hypothesis Testing

Correlation

Regression

Multiple Regression

Hypothesis Tests Applied to Means: One Sample

Hypothesis Tests Applied to Means: Two Related Samples

Hypothesis Tests Applied to Means: Two Independent Samples

Power

One-Way Analysis of Variance

Factorial Analysis of Variance

Repeated-Measures Analysis of Variance

Chi-Square

Nonparametric and Resampling Statistical Tests

Meta-Analysis

Filters

Exam 3: Displaying Data

When we plot a histogram, the values on the X axis are

To get an accurate idea about the shape of a distribution,

The real lower limit and the real upper limit of the interval 40-49 are

A frequency distribution

Assume that you have a set of data with 70 values spread fairly evenly between 0 and 100. The optimal number of categories for a histogram of these data would be approximately

When a variable has many values, and each value occurs rarely, a stem-and-leaf plot is preferable to a histogram.

In a frequency distribution, the number of observations that fall within an interval is plotted.

The following graphic is adapted from one in Wainer (1984), plotting the number of private and public elementary schools (in thousands) in the U.S. between 1930 and 1970. Wainer was presenting it as a bad example, and I have made it worse. What is bad about this example? ​

The following is a frequency distribution. ​

The next six questions are based on the following data. -Where do the data tend to cluster?

In the text there was a stem-and-leaf display showing the performance of students who attended class regularly and those who often skipped class. This display illustrated

In the above data set, the outliers would most likely be

The "real lower limit" of an interval in a histogram is

Kurtosis is

Which of the following distributions can be symmetric?

Given the following numbers, 10, 25, 37, and 40, the leading digits are 1, 2, 3, and 4.

The next six questions are based on the following data. -Create a stem and leaf plot for these data.

Introduction

Basic Concepts

Measures of Central Tendency

Measures of Variability

The Normal Distribution

Basic Concepts of Probability

Sampling Distributions and Hypothesis Testing

Correlation

Regression

Multiple Regression

Hypothesis Tests Applied to Means: One Sample

Hypothesis Tests Applied to Means: Two Related Samples

Hypothesis Tests Applied to Means: Two Independent Samples

Power

One-Way Analysis of Variance

Factorial Analysis of Variance

Repeated-Measures Analysis of Variance

Chi-Square

Nonparametric and Resampling Statistical Tests

Meta-Analysis

Filters

The following graphic is adapted from one in Wainer (1984), plotting the number of private and public elementary schools (in thousands) in the U.S. between 1930 and 1970. Wainer was presenting it as a bad example, and I have made it worse. What is bad about this example?

The following is a frequency distribution.