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Refer to Exercise 2.18 and calculate the number of the 600 items falling into each of the classes. Then graph a frequency histogram for these data.

Short Answer

Expert verified

A histogram can be defined as a set of rectangles with bases along with the intervals between class boundaries.

Step by step solution

01

Given information

02

Histogram

A histogram can be defined as a set of rectangles with bases and intervals between class boundaries. Each rectangle bar depicts some data, and all the rectangles are adjacent. The heights of rectangles are proportional to corresponding frequencies of similar as well as for different classes. Let's learn about histograms in more detail.

03

Computation table

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Most popular questions from this chapter

Congress voting on womenโ€™s issues. The American Economic Review (March 2008) published research on how the gender mix of a U.S. legislatorโ€™s children can influence the legislatorโ€™s votes in Congress. The American Association of University Women (AAUW) uses voting records of each member of Congress to compute an AAUW score, where higher scores indicate more favorable voting for womenโ€™s rights. The researcher wants to use the number of daughters a legislator has to predict the legislatorโ€™s AAUW score.

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Voltage sags and swells. The power quality of a transformer is measured by the quality of the voltage. Two causes of poor power quality are "sags" and "swells." A sag is an unusual dip and a swell is an unusual increase in the voltage level of a transformer. The power quality of transformers built in Turkey was investigated in Electrical Engineering (Vol. 95, 2013). For a sample of 103 transformers built for heavy industry, the mean number of sags per week was 353 and the mean number of swells per week was 184. Assume the standard deviation of the sag distribution is 30 sags per week and the standard deviation of the swell distribution is 25 swells per week.

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Construct a scatterplot for the data in the following table.

X

.5

1

1.5

y

2

1

3

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