Mean_ Median_ and Mode by ewghwehws

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									                  Mean, Median, and Mode
COURSE 2 LESSON 1-10




                        Find the average of 502, 477, 593, 481, 735, and 614.



            502 + 477 + 593 + 481 + 735 + 614           Divide the sum by
                            6                           the number of terms.



                       3,402
                         6
                             = 567                      Simplify. The mean is 567




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                  Mean, Median, and Mode
COURSE 2 LESSON 1-10




                         Find the outlier of the data below. Describe how the outlier
               affects the mean.


          40 37 53 42 45 12 39 48


          The outlier is 12, which is much lower than the other data items.


          The outlier lowers the mean of the data.




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                  Mean, Median, and Mode
COURSE 2 LESSON 1-10




                         Find the average of the         18 Responses to
               data in the chart.                  “How many pizzas did you order?”
                                                       2 0 1 2 4 2
          First write the data in order                1 0 3 2 0 8
          from least to greatest.                      0 1 2 3 0 1


          000001111222223348

                                               The two middle values are 1 and 2.

                       1+2
                        2
                           = 1.5               Find the mean of the two middle values.


          The median is 1.5 pizzas.



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                  Mean, Median, and Mode
COURSE 2 LESSON 1-10




                         Find the average of       Favorite Pizza Topping of
               the data in the chart.              Twelve People Surveyed
                                               peppers onions        mushrooms
                                               onions     sausage peppers
                                               onions     peppers mushrooms
                                               onions     sausage onions


          Make a table to organize the data.

          Peppers        Onions       Mushrooms       Sausage




          The mode is onions.


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                  Mean, Median, and Mode
COURSE 2 LESSON 1-10




                        Suppose a teen jogs an average of 2.5 mi per day on
               weekdays and 4 mi per day on weekends. How many miles does this
               teen jog each week?



                                                Multiply the weekday average by
                                                the number of weekdays. Multiply
                2.5 • 5 + 4 • 2 = 20.5
                                                the weekend average by the
                                                number of weekend days.



          The teen jogs a total of 20.5 mi each week.




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                 Mean, Median, and Mode
COURSE 2 LESSON 1-10




          Find the mean, median, and mode of each set of data.
                1. 25    27    21   27    20
                   mean, 24; median, 25; mode, 27
                2. –8    –4    2    10   –10
                   mean, –2; median, –4; mode, no mode
                3. 7.5   3.6   15.4      3.6   15.4
                   mean, 9.1; median, 7.5; mode, 3.6 and 15.4




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