Find the Mean 9 , 15 , 17 , 18 , 6 , 20 , 8 , 5 , 18 , 18 , 10 , 5 , 14 , 12 , 10 , 7

$9$ , $15$ , $17$ , $18$ , $6$ , $20$ , $8$ , $5$ , $18$ , $18$ , $10$ , $5$ , $14$ , $12$ , $10$ , $7$

Step 1

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

$\frac{9 + 15 + 17 + 18 + 6 + 20 + 8 + 5 + 18 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Step 2

Simplify the numerator.

Add $9$ and $15$ .

$\frac{24 + 17 + 18 + 6 + 20 + 8 + 5 + 18 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $24$ and $17$ .

$\frac{41 + 18 + 6 + 20 + 8 + 5 + 18 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $41$ and $18$ .

$\frac{59 + 6 + 20 + 8 + 5 + 18 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $59$ and $6$ .

$\frac{65 + 20 + 8 + 5 + 18 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $65$ and $20$ .

$\frac{85 + 8 + 5 + 18 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $85$ and $8$ .

$\frac{93 + 5 + 18 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $93$ and $5$ .

$\frac{98 + 18 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $98$ and $18$ .

$\frac{116 + 18 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $116$ and $18$ .

$\frac{134 + 10 + 5 + 14 + 12 + 10 + 7}{16}$

Add $134$ and $10$ .

$\frac{144 + 5 + 14 + 12 + 10 + 7}{16}$

Add $144$ and $5$ .

$\frac{149 + 14 + 12 + 10 + 7}{16}$

Add $149$ and $14$ .

$\frac{163 + 12 + 10 + 7}{16}$

Add $163$ and $12$ .

$\frac{175 + 10 + 7}{16}$

Add $175$ and $10$ .

$\frac{185 + 7}{16}$

Add $185$ and $7$ .

$\frac{192}{16}$

Step 3

Divide $192$ by $16$ .

$12$