Chapter 2: Q.9 (page 127)
Using the data from Mrs. Ramirez鈥檚 math class supplied in Exercise , construct a bar graph showing the percentages
Short Answer
The bar graph showing percentages is as follow:

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Chapter 2: Q.9 (page 127)
Using the data from Mrs. Ramirez鈥檚 math class supplied in Exercise , construct a bar graph showing the percentages
The bar graph showing percentages is as follow:

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Table 2.76 gives the percent of children under five considered to be underweight.

What is the best estimate for the mean percentage of underweight children? What is the standard deviation? Which interval(s) could be considered unusual? Explain.
The following box plot shows the U.S. population for 1990, the latest available year.

a. Are there fewer or more children (age 17 and under) than senior citizens (age 65 and over)? How do you know?
b. 12.6% are age 65 and over. Approximately what percentage of the population are working age adults (above age 17 to age 65)?
The most obese countries in the world have obesity rates that range from 11.4% to 74.6%. This data is summarized in Table 14.

What is the best estimate of the average obesity percentage for these countries? What is the standard deviation for the listed obesity rates? The United States has an average obesity rate of 33.9%. Is this rate above average or below? How 鈥渦nusual鈥 is the United States鈥 obesity rate compared to the average rate? Explain.
Use the following information to answer the next six exercises. Sixty-five randomly selected car salespersons were asked the number of cars they generally sell in one week. Fourteen people answered that they generally sell three cars; nineteen generally sell four cars; twelve generally sell five cars; nine generally sell six cars; eleven generally sell seven cars.
Interquartile range (IQR) = _____ 鈥 _____ = _____
The data are the prices of different laptops at an electronics store. Round each value to the nearest ten.
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