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Exam 3: Describing Data Visually

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Question 41

Multiple Choice

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

A) bin midpoint.
B) bin limit.
C) bin frequency.
D) bin width.

E) A) and B)
F) None of the above

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Question 42

Multiple Choice

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Which is a not a characteristic of pie charts?

A) Pie charts can only convey a general idea of the data values.
B) Pie charts are ineffective when they have too many slices.
C) Exploded and 3-D pie charts will allow more "slices."
D) Pie chart data always represent parts of a whole (e.g. ,market share) .

E) A) and C)
F) B) and C)

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Question 43

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

Pie charts are useful in displaying frequencies that sum to a total.

Which is the most serious deceptive graphical technique?

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

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

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

Which statement is not true concerning Sturges' Rule?

Excel's pyramid charts make it easier to read the data values.

Which is not a characteristic of a log scale for time series data?

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

A study found the following parts per billion of nitrosamines in a sample of domestic beers.(a)Construct a frequency distribution of four classes with equal class sizes.(b)Construct another frequency distribution of four classes using unequal class intervals or an open-ended interval for the highest class.(c)Which frequency distribution is preferable? Why?

The number of bins in this histogram (caffeine content in mg/oz for 65 soft drinks)is consistent with Sturges' Rule.

Scatter plots are:

Which is considered a novelty chart in Excel?

Which is not a characteristic of a dot plot?

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.

If you have 256 data points,how many classes (bins) would Sturges' Rule suggest?