Find the Mean 2 , 8 , 10 , 25 , 38 , 16 , 12 , 9 , 2

$2$ , $8$ , $10$ , $25$ , $38$ , $16$ , $12$ , $9$ , $2$

Step 1

The mean of a set of numbers is the sum divided by the number of terms.

$\frac{2 + 8 + 10 + 25 + 38 + 16 + 12 + 9 + 2}{9}$

Step 2

Simplify the numerator.

Add $2$ and $8$ .

$\frac{10 + 10 + 25 + 38 + 16 + 12 + 9 + 2}{9}$

Add $10$ and $10$ .

$\frac{20 + 25 + 38 + 16 + 12 + 9 + 2}{9}$

Add $20$ and $25$ .

$\frac{45 + 38 + 16 + 12 + 9 + 2}{9}$

Add $45$ and $38$ .

$\frac{83 + 16 + 12 + 9 + 2}{9}$

Add $83$ and $16$ .

$\frac{99 + 12 + 9 + 2}{9}$

Add $99$ and $12$ .

$\frac{111 + 9 + 2}{9}$

Add $111$ and $9$ .

$\frac{120 + 2}{9}$

Add $120$ and $2$ .

$\frac{122}{9}$

Step 3

Divide.

$13.\overline{5}$

Step 4

The mean should be rounded to one more decimal place than the original data. If the original data were mixed, round to one decimal place more than the least precise.

$13.6$

Find the Mean 2 , 8 , 10 , 25 , 38 , 16 , 12 , 9 , 2

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