Question 1

Which is not considered a deceptive graphical technique?

Accepted Answer

A) Undefined units 
B) 2D graphs 
C) Authority figures 
D) Distracting pictures 
A) Undefined units 
B) 2D graphs 
C) Authority figures 
D) Distracting pictures

Question 2

Line charts are not used for cross-sectional data.

Accepted Answer

A) True 
 B)False

Question 3

Which is not a characteristic of a dot plot?

Accepted Answer

A) Simplicity 
B) Legibility 
C) Wide bins 
D) Dot stacking 
A) Simplicity 
B) Legibility 
C) Wide bins 
D) Dot stacking

Question 4

A statistician prepared a bar chart showing, in descending order, the frequency of six underlying causes of general aviation accidents (pilot error, mechanical problems, disorientation, miscommunication, controller error, other). What would we call this type of chart?

Accepted Answer

A) Pivot table 
B) Pareto chart 
C) Log scale chart 
D) Frequency polygon 
A) Pivot table 
B) Pareto chart 
C) Log scale chart 
D) Frequency polygon

Question 5

Pie charts are attractive to statisticians, but are rarely used in business or general media.

Accepted Answer

A) True 
 B)False

Question 6

We would use a pivot table to:

Accepted Answer

A) cross-tabulate frequencies of occurrence of two variables. 
B) rotate the data around a central point. 
C) establish cause-and-effect between X and Y. 
D) display the data in a 3D scatter plot. 
A) cross-tabulate frequencies of occurrence of two variables. 
B) rotate the data around a central point. 
C) establish cause-and-effect between X and Y. 
D) display the data in a 3D scatter plot.

Question 7

Below is a sorted stem-and-leaf diagram for the measured speeds (miles per hour) of 49 randomly chosen vehicles on highway I-80 in Nebraska. What is the highest observed speed? stem unit $ =10 $
leaf unit $ =1 $
$\begin{array}{rrl}
\text { Frequency } & \text { Stem Leaf } \
1 & 4 & 9 \
1 & 5 & 5 \
17 & 6 & 01222455556688999 \
19 & 7 & 0111233345666778999 \
7 & 8 & 0133557 \
\underline{4} & 9 & 0122 \
49 &
\end{array}$

Accepted Answer

A) 92 
B) 90 
C) 87 
D) Impossible to tell 
A) 92 
B) 90 
C) 87 
D) Impossible to tell

Question 8

If you have 32 data points, how many classes (bins) would Sturges' Rule suggest?

Accepted Answer

A) 5 
B) 6 
C) 7 
D) 8 
A) 5 
B) 6 
C) 7 
D) 8

Question 9

Which is a reason for using a log scale for time series data?

Accepted Answer

A) It helps compare growth in time series of dissimilar magnitude. 
B) General business audiences find it easier to interpret a log scale. 
C) On a log scale, equal distances represent equal dollar amounts. 
D) The axis labels are usually easier to read in log units. 
A) It helps compare growth in time series of dissimilar magnitude. 
B) General business audiences find it easier to interpret a log scale. 
C) On a log scale, equal distances represent equal dollar amounts. 
D) The axis labels are usually easier to read in log units.

Question 10

A frequency distribution usually has equal bin widths.

Accepted Answer

A) True 
 B)False

Question 11

A population is of size 5,500 observations. When the data are represented in a relative frequency distribution, the relative frequency of a given interval is 0.15. The frequency in this interval is equal to:

Accepted Answer

A) 4,675. 
B) 800. 
C) 675. 
D) 825.15 percent of 5,500 is 825. 
A) 4,675. 
B) 800. 
C) 675. 
D) 825.15 percent of 5,500 is 825.

Question 12

Which is not a tip for effective column charts?

Accepted Answer

A) Time usually goes on the horizontal axis. 
B) Column height should be proportional to the quantity displayed. 
C) Label data values at the top of each column unless graphing lots of data. 
D) The nonzero origin rule may be waived for financial reports. 
A) Time usually goes on the horizontal axis. 
B) Column height should be proportional to the quantity displayed. 
C) Label data values at the top of each column unless graphing lots of data. 
D) The nonzero origin rule may be waived for financial reports.

Question 13

The distribution pictured below is:

Accepted Answer

A) bimodal and skewed right. 
B) bimodal and skewed left. 
C) skewed right. 
D) skewed left. 
A) bimodal and skewed right. 
B) bimodal and skewed left. 
C) skewed right. 
D) skewed left.

Question 14

Effective summary tables generally:

Accepted Answer

A) have very detailed column headings and footnotes. 
B) round their data to three or four significant digits. 
C) use plenty of heavy vertical lines to separate the columns. 
D) have the raw data listed in a footnote for clarity. 
A) have very detailed column headings and footnotes. 
B) round their data to three or four significant digits. 
C) use plenty of heavy vertical lines to separate the columns. 
D) have the raw data listed in a footnote for clarity.

Question 15

Briefly comment on strengths and weaknesses of this display. Cite specific principles of good graphs, as well as offering your own general interpretation.
$$\text { Physician Salaries, Garwood Clinic, 1985-2005 }$$

Accepted Answer

Attractive, but area trick is

Question 16

The distribution pictured below is:

Accepted Answer

A) bimodal and skewed right. 
B) bimodal and skewed left. 
C) skewed right. 
D) skewed left. 
A) bimodal and skewed right. 
B) bimodal and skewed left. 
C) skewed right. 
D) skewed left.

Question 17

Students were asked to record how many hours they worked at an outside job last week. Their answers are shown below. (a) Make a dot plot. (b) Use your judgment to construct a frequency distribution using whatever classes (bins) you wish. (c) Make a histogram. (d) Describe the distribution. (e) Did your bin choices agree with Sturges' Rule? If not, why not?

Accepted Answer

\[\begin{array} { c c c c c } 
2 & 17 &

Question 18

Stacked dot plots are useful in understanding the association between two paired quantitative variables (X, Y).

Accepted Answer

A) True 
 B)False

Question 19

Briefly list strengths and weaknesses of this display. Cite specific principles of good graphs, as well as offering your own general interpretation.

Accepted Answer

As pie charts go, not too bad,

Question 20

Sturges' Rule is merely a suggestion, not an ironclad requirement.

Accepted Answer

A) True 
 B)False

Which is not considered a deceptive graphical technique?

Line charts are not used for cross-sectional data.

Which is not a characteristic of a dot plot?

A statistician prepared a bar chart showing, in descending order, the frequency of six underlying causes of general aviation accidents (pilot error, mechanical problems, disorientation, miscommunication, controller error, other). What would we call this type of chart?

Pie charts are attractive to statisticians, but are rarely used in business or general media.

We would use a pivot table to:

If you have 32 data points, how many classes (bins) would Sturges' Rule suggest?

Which is a reason for using a log scale for time series data?

A frequency distribution usually has equal bin widths.

A population is of size 5,500 observations. When the data are represented in a relative frequency distribution, the relative frequency of a given interval is 0.15. The frequency in this interval is equal to:

Which is not a tip for effective column charts?

The distribution pictured below is:

Effective summary tables generally:

Briefly comment on strengths and weaknesses of this display. Cite specific principles of good graphs, as well as offering your own general interpretation. $\text { Physician Salaries, Garwood Clinic, 1985-2005 }$

The distribution pictured below is:

Stacked dot plots are useful in understanding the association between two paired quantitative variables (X, Y).

Briefly list strengths and weaknesses of this display. Cite specific principles of good graphs, as well as offering your own general interpretation.

Sturges' Rule is merely a suggestion, not an ironclad requirement.

Overview of Statistics

Data Collection

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time Series Analysis

Chi-Square Tests

Nonparametric Tests

Quality Management

Filters

Exam 3: Describing Data Visually

Which is not considered a deceptive graphical technique?

Line charts are not used for cross-sectional data.

Which is not a characteristic of a dot plot?

A statistician prepared a bar chart showing, in descending order, the frequency of six underlying causes of general aviation accidents (pilot error, mechanical problems, disorientation, miscommunication, controller error, other). What would we call this type of chart?

Pie charts are attractive to statisticians, but are rarely used in business or general media.

We would use a pivot table to:

If you have 32 data points, how many classes (bins) would Sturges' Rule suggest?

Which is a reason for using a log scale for time series data?

A frequency distribution usually has equal bin widths.

A population is of size 5,500 observations. When the data are represented in a relative frequency distribution, the relative frequency of a given interval is 0.15. The frequency in this interval is equal to:

Which is not a tip for effective column charts?

The distribution pictured below is:

Effective summary tables generally:

The distribution pictured below is:

Stacked dot plots are useful in understanding the association between two paired quantitative variables (X, Y).

Briefly list strengths and weaknesses of this display. Cite specific principles of good graphs, as well as offering your own general interpretation.

Sturges' Rule is merely a suggestion, not an ironclad requirement.

Overview of Statistics

Data Collection

Descriptive Statistics

Probability

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions and Estimation

One-Sample Hypothesis Tests

Two-Sample Hypothesis Tests

Analysis of Variance

Simple Regression

Multiple Regression

Time Series Analysis

Chi-Square Tests

Nonparametric Tests

Quality Management

Filters