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04:52
04:39 04:52Using the Empirical Rule In Exercises 29–34, use the Empirical Rule.
Use the sample statistics from Exercise 29 and assume the number of vehicles in the sample is 75.
a. Estimate the number of vehicles whose speeds are between 63 miles per hour and 71 miles per hour.
Using and Interpreting Concepts
Using and Interpreting Concepts Finding Quartiles, Interquartile Range, and Outliers In Exercises 11 and 12,
(a) find the quartiles
56 63 51 60 57 60 60 54 63 59 80 63 60 62 65
Yoga Classes The data sets at the left show the ages of all participants in two yoga classes.
a. Make a back-to-back stem-and-leaf plot as described in Exercise 41 to display the data.
Song Lengths Side-by-side box-and-whisker plots can be used to compare two or more different data sets. Each box-and-whisker plot is drawn on the same number line to compare the data sets more easily. The lengths (in seconds) of songs played at two different concerts are shown.
a. Describe the shape of each distribution. Which concert has less variation in song lengths?
Extending Concepts
Data Analysis Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are shown in the table at the left.
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a. Find the mean and the median of the data.
U.S. Trade Deficits The table at the left shows the U.S. trade deficits (in billions of dollars) with 18 countries in 2020. (Source: U.S. Department of Commerce)
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a. Find the mean and the median of the trade deficits.
