Find the Mean 72 , 71 , 70 , 70 , 70 , 69 , 69 , 69 , 69 , 69 , 68 , 68 , 68 , 67 , 67

$72$ ,

$71$ ,

$70$ ,

$69$ ,

$68$ ,

$67$ ,

$67$

Step 1

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

$\frac{72 + 71 + 70 + 70 + 70 + 69 + 69 + 69 + 69 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Step 2

Simplify the numerator.

Add

$72$ and

$71$ .

$\frac{143 + 70 + 70 + 70 + 69 + 69 + 69 + 69 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$143$ and

$70$ .

$\frac{213 + 70 + 70 + 69 + 69 + 69 + 69 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$213$ and

$70$ .

$\frac{283 + 70 + 69 + 69 + 69 + 69 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$283$ and

$70$ .

$\frac{353 + 69 + 69 + 69 + 69 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$353$ and

$69$ .

$\frac{422 + 69 + 69 + 69 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$422$ and

$69$ .

$\frac{491 + 69 + 69 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$491$ and

$69$ .

$\frac{560 + 69 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$560$ and

$69$ .

$\frac{629 + 69 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$629$ and

$69$ .

$\frac{698 + 68 + 68 + 68 + 67 + 67}{15}$

Add

$698$ and

$68$ .

$\frac{766 + 68 + 68 + 67 + 67}{15}$

Add

$766$ and

$68$ .

$\frac{834 + 68 + 67 + 67}{15}$

Add

$834$ and

$68$ .

$\frac{902 + 67 + 67}{15}$

Add

$902$ and

$67$ .

$\frac{969 + 67}{15}$

Add

$969$ and

$67$ .

$\frac{1036}{15}$

Step 3

Divide.

$69.0\overline{6}$

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.

$69.1$

Find the Mean 72 , 71 , 70 , 70 , 70 , 69 , 69 , 69 , 69 , 69 , 68 , 68 , 68 , 67 , 67

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