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Chapter 11: Q. 19 (page 615)

Make a histogram from the stem-and-leaf plot. Don not use the same intervals in your histogram as are used in the stem-and-leaf plot.

913578891022223778911357121256678888key:9|1=9.1

Short Answer

Expert verified

The histogram is,

Step by step solution

01

Step 1. Given Information.

The provided stem-and-leaf plot is

913578891022223778911357121256678888key:9|1=9.1

02

Step 2. Data Values.

Write the data values by converting the stem-and-leaf plot.

9.1,9.3,9.5,9.7,9.8,9.8,9.9,10.2,10.2,10.2,10.2,10.3,10.7,10.7,10.8,10.9,11.3,11.5,11.7,12.1,12.2,12.5,12.6,12.6,12.7,12.8,12.8,12.8,12.8

03

Step 3. Frequency Table.

Make intervals of equal size for the provided data. For each interval, count the number of tally marks and write the frequency.

Intervals

Frequency

9.1鈭�10.1

7

10.1鈭�11.1

9

11.1鈭�12.1

3

12.1鈭�13.1

10

04

Step 4. Histogram.

Draw the horizontal and vertical axes. Label the intervals on the horizontal axis and the frequencies on the vertical axis.

Construct a bar to show the frequency of each interval.

05

Step 5. Conclusion.

The histogram is,

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Most popular questions from this chapter

Find the sum or difference.

鈭�45鈭�25

The table shows the number of visitors (in millions) to ski areas in the United States in 10 different years.

  1. Make a line graph using every 5th year, starting with 1980. What trend does the graph show?
  2. Make a new line graph using all the years given in the table. What trend does it show?
  3. Which line graph represents the data more accurately, the one in part (a) or the one in part (b)? Explain.

Make a stem-and-leaf plot of the following data:

8,11,23,24,13,35,14,11,16,17,18,9,16,17,15,21,25,20,21,37,22

The manager of an apartment building wants to know if noise is a problem in the building. The manager asks one person on each floor if the person thinks noise is a problem.

  1. Describe the survey鈥檚 population and sampling method.
  2. Do you think the survey could result in a biased sample? Explain.
  3. Describe another sampling method the manager could use. Could this method result in a biased sample? Explain.

Copy and complete: A sample in which every member of the population has an equal chance of being selected is a(n)鈥�.?.
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