Questions and Answers of Statistics Informed Decisions Using Data

Construct a frequency histogram and a relative frequency histogram using the data in Table 9.Approach The value of each category of data (number of customers) is on the horizontal axis and the
Suppose you are considering investing in a Roth IRA. You collect the data in Table 12, which represent the five-year rate of return (in percent, adjusted for sales charges) for a simple random sample
Construct a frequency and relative frequency histogram of the five-year rate of- return data discussed in Example 3.Approach To draw the frequency histogram, use the frequency distribution in Table
Construct a frequency and relative frequency histogram of the five-year rate of- return data discussed in Example 3.Approach We will use StatCrunch to construct the frequency and relative frequency
The data in Table 14 represent the two-year average percentage of persons living in poverty, by state, for the years 2012–2013. Draw a stem-and-leaf plot of the data.Approach Step 1 Treat the
Construct a stem-and-leaf plot of the poverty data discussed in Example 6.Approach We will use Minitab. The steps for constructing the graphs using Minitab or StatCrunch are given in the Technology
Draw a dot plot for the number of arrivals at Wendy’s data from Table 8.Approach The smallest observation in the data set is 1 and the largest is 11. Write the numbers 1 through 11 horizontally.
Figure 16 displays the histogram obtained in Example 4 for the five-year rate of return for large-blended mutual funds. Describe the shape of the distribution.Approach We compare the shape of the
The following data represent the number of grams of fat in breakfast meals offered at a local fast food restaurant.(a) construct a stem-and-leaf plot and(b) describe the shape of the distribution. 26
The following data represent the ages of award winners for best actor and best actress in a leading role for the 20 years from 1985 to 2004.(a) Construct an ordered back to back stem-and-leaf
The Partisan Conflict Index (PCI) tracks the degree of political disagreement among U.S. politicians in the federal government. It is found by measuring the frequency of newspaper articles reporting
The accompanying data represent the percentage of recent high school graduates (graduated within 12 months before the given year-end) who enrolled in college in the fall. Construct a time-series plot
Which do you prefer: histograms, stem-and-leaf plots, or frequency polygons? Be sure to support your opinion. Are there circumstances in which one might be preferred over another?

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