Exam 3: Describing Data Visually

Because most data values are on the left, we would say that this dot plot (burglary rates per 100,000 persons in 350 U.S. cities) shows a distribution that is skewed to the left (negatively skewed).

Here are advertised prices of 23 used Chevy Impalas. Describe the distribution's shape. Is the number of histogram classes correct?

It is possible to construct a histogram or frequency polygon with open-ended classes.

Students were given a take-home statistics assignment and were asked to write down how long it took them (in minutes). 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?

Scatter plots are:

The zero origin rule may be waived for column or line charts if the objective is merely to visualize relative change over time.

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

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

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

Which is not a poor graphing technique?

Which is not a reason why pie charts are popular in business?

Which is a characteristic of a histogram's bars?

Which is not revealed on a scatter plot?

A common error with pie charts is using too few "slices."

Except for the Y-axis scaling, a histogram will look the same if we use relative frequencies instead of raw frequencies (with the same bin limits).

Which display is most likely to reveal association between X and Y?

The ______________ can be used to differentiate the "vital few" causes of quality problems from the "trivial many" causes of quality problems.

The point halfway between the bin limits in a frequency distribution is known as the:

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

Which of the following is least useful in visualizing categorical data?