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8-66.
1. Jerome is keeping track of how many books he and his friends have read during the first 100 days of school. The numbers of books are 12, 17, 10, 24, 18, 31, 17, 21, 20, 14, 30, 9, and 25. Help Jerome present the data to his teacher. 8-66 HW eTool (Desmos). Homework Help ✎

1. How many pieces of data, or observations, does Jerome have?

2. Make a stem-and-leaf plot of the data.

3. Jerome wants to present the data with a plot that makes it possible to calculate the mean and the median. Can he do this with a stem-and-leaf plot? He is not asking you to calculate them, but he wants you to tell him if it is possible and why.

4. Use the stem-and-leaf plot to describe how the data is spread. That is, is it spread out, or is it concentrated mostly in a narrow range?

5. Would it be helpful for Jerome to create a dot plot to display and analyze the data from problem 8-66? Why or why not?

Refer to the data.

Does the stem-and-leaf plot show all of the data points?

Where are most of the values concentrated?

Would it be practical to put this information into a dot plot?

No, there are too many data points that do not repeat.

Make a stem-and-leaf plot using the eTool below.
Click the link at right for the full version of the eTool: CC1 8-66 HW eTool