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Warm-Up. Find the mean, median, mode and range of each set of data. Which one, if any, do you think represents the data best? 5, 7, 8, 6 ,8, 9, 10, 8, 7, 5, 9, 9 7, 8, 9, 0, 7, 6, 8, 10, 8. 13.7 Stem and Leaf Plots and Histograms. Stem and Leaf Plot.

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Warm-Up

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Warm-Up

Find the mean, median, mode and range of each set of data. Which one, if any, do you think represents the data best?

5, 7, 8, 6 ,8, 9, 10, 8, 7, 5, 9, 9

7, 8, 9, 0, 7, 6, 8, 10, 8


13.7 Stem and Leaf Plots and Histograms


Stem and Leaf Plot

*Leaves are only ever one digit, the last

*Stems can be more than one

*Must ALWAYS have a key

*Leaves must be in order

*Never skip stems, even if there are no digits to go with them


The number of home runs hit by the 20 baseball players with the best single-season batting averages in Major League Baseball since 1900 are listed below. Make a stem-and-leaf plot of the data.

14, 25, 8, 8, 7, 7, 19, 37, 39, 18, 42, 23, 4, 32, 14, 21,

3, 12, 19, 41


The back-to-back stem-and-leaf plot shows the ages of members of the U.S. men’s and women’s 2004 Olympic gymnastics teams. Compare the ages of the gymnasts on the two teams.


Frequency Tables and Histograms

frequency: the number of data values in a specific interval

frequency table: used to organize date into the different intervals

histogram: a bar graph the displays data from a frequency table

*bars must have equal width

* height or length of the bar represents the frequency

* there is no space between the bars


The prices (in dollars) of sandwiches at a restaurant are listed below. Make a histogram of the data.

4.00, 4.00, 4.25, 4.50, 4.75, 4.25, 5.95, 5.50, 5.50, 5.75


Assignment:pg. 883#3 – 14 all, 17, 18


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