Name________________________

CALCULATING THE MEAN #3--KEY

Directions: Calculate the mean for each set of numbers below.  To find the mean of a set of numbers, add all of the data together, then divide that sum by the amount of numbers in the set.

Example:  Here are the numbers in the set (2, 1, 8, 10)

Add them together              2 + 1 + 8 + 10 = a total of 21

Divide by the amount of numbers in the set             21 divided by 4 gives you a mean of 5.25

SUM                           DIVIDED BY                        MEAN

1)         (14, 4, 5, 8,)                                       __31___                                  _4_                                __7.75_

2)         (8, 4, 4, 6, 1, 4, 2, 1)                          __30___                                  _8_                                __3.75_

3)         (12, 16, 20,)                                       __48___                                  _3_                                __16___

4)         (9, 2, 5, 7, 6)                                      __29___                                  _5_                                ___5.8_

5)         (11, 2, 4, 6, 1, 16, 9)                          __49___                                  _7_                                ___7___

6)         (13, 4, 16, 10,)                                    __43___                                 _4_                                _10.75_

7)         (10, 4, 6, 10, 2)                                  __32___                                  _5_                                ___6.4_

8)         (25, 9, 8, 21,)                                     __63___                                  _4_                                _15.75_

9)         (6, 8, 15, 11, 7)                                  __47___                                  _5_                                __9.4__

10)       (5, 2, 3, 5, 1, 4, 6, 1, 2, 2)                   __31___                                 _10__                            ___3.1_

EXTENSION:  List all of the means from #1-10 in order from least to greatest.

3.1,  3.75,  5.8,  6.4,  7,  7.75,  9.4,  10.75,  15.75,  16