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Exam 3: Describing Data Visually

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Question 1

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A pie chart can generally be used instead of a bar chart.

A) True
B) False

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Question 2

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

A) True
B) False

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Question 3

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A column chart can sometimes be used instead of a line chart for time series data.

Effective summary tables generally

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

In a bimodal histogram,the two highest bars will have the same height.

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?

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?

Which is not a characteristic of using a log scale to display time series data?

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

Dot plots are similar to histograms with many bins (classes).

Which is not a poor graphing technique?

A dot plot would be useful in visualizing scores on an exam in a class of 30 students.

Which data would be suitable for a pie chart?

A population has 75 observations.One class interval has a frequency of 15 observations.The relative frequency in this category is

Which is a not a characteristic of pie charts?

Scatter plots are used to visualize association in samples of paired data (X,Y).

Craig operates a part-time snow-plowing business using a 2002 GMC 2500 HD extended cab short box truck.Describe Craig's gasoline mileage based on this histogram of 195 tanks of gas.

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.How many vehicles were traveling exactly the speed limit (70 mph) ?

Log scales are common because most people are familiar with them.