Find the Mean 18 , 9 , 5 , 13 , 8 , 3 , 4

$18$ , $9$ , $5$ , $13$ , $8$ , $3$ , $4$

Step 1

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

$\frac{18 + 9 + 5 + 13 + 8 + 3 + 4}{7}$

Step 2

Simplify the numerator.

Add $18$ and $9$ .

$\frac{27 + 5 + 13 + 8 + 3 + 4}{7}$

Add $27$ and $5$ .

$\frac{32 + 13 + 8 + 3 + 4}{7}$

Add $32$ and $13$ .

$\frac{45 + 8 + 3 + 4}{7}$

Add $45$ and $8$ .

$\frac{53 + 3 + 4}{7}$

Add $53$ and $3$ .

$\frac{56 + 4}{7}$

Add $56$ and $4$ .

$\frac{60}{7}$

Step 3

Divide.

$8.\overline{571428}$

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.

$8.6$

Find the Mean 18 , 9 , 5 , 13 , 8 , 3 , 4

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