Find the Mean 47.5 , 42 , 48.5 , 44.5 , 47 , 41 , 48 , 43 , 49

$47.5$ , $42$ , $48.5$ , $44.5$ , $47$ , $41$ , $48$ , $43$ , $49$

Step 1

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

$\frac{47.5 + 42 + 48.5 + 44.5 + 47 + 41 + 48 + 43 + 49}{9}$

Step 2

Simplify the numerator.

Add $47.5$ and $42$ .

$\frac{89.5 + 48.5 + 44.5 + 47 + 41 + 48 + 43 + 49}{9}$

Add $89.5$ and $48.5$ .

$\frac{138 + 44.5 + 47 + 41 + 48 + 43 + 49}{9}$

Add $138$ and $44.5$ .

$\frac{182.5 + 47 + 41 + 48 + 43 + 49}{9}$

Add $182.5$ and $47$ .

$\frac{229.5 + 41 + 48 + 43 + 49}{9}$

Add $229.5$ and $41$ .

$\frac{270.5 + 48 + 43 + 49}{9}$

Add $270.5$ and $48$ .

$\frac{318.5 + 43 + 49}{9}$

Add $318.5$ and $43$ .

$\frac{361.5 + 49}{9}$

Add $361.5$ and $49$ .

$\frac{410.5}{9}$

Step 3

Divide $410.5$ by $9$ .

$45.6\overline{1}$

Step 4

Divide.

$45.6\overline{1}$

Step 5

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.

$45.6$

Find the Mean 47.5 , 42 , 48.5 , 44.5 , 47 , 41 , 48 , 43 , 49

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