Mean Math Example 3

Follow the full solution, then compare it with the other examples linked below.

Example 3

easy
Find the mean of {12,7,3,14,9,11}\{12, 7, 3, 14, 9, 11\}.

Solution

  1. 1
    Sum: 12+7+3+14+9+11=5612 + 7 + 3 + 14 + 9 + 11 = 56.
  2. 2
    Divide by n=6n = 6: xห‰=566โ‰ˆ9.33\bar{x} = \frac{56}{6} \approx 9.33.

Answer

xห‰โ‰ˆ9.33\bar{x} \approx 9.33
Apply the mean formula xห‰=โˆ‘xin\bar{x} = \frac{\sum x_i}{n} directly. When the result is not a whole number, round appropriately or express as a fraction.

About Mean

The arithmetic mean (average) of a data set is the sum of all values divided by the number of values.

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More Mean Examples

Example 1 easy

Find the arithmetic mean of the data set: [formula].

Example 2 medium

A student scored [formula], and [formula] on five tests. What score does she need on the sixth test

Example 4 medium

Five quiz scores have a mean of [formula]. Four of the scores are [formula], [formula], [formula], a

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