Find the Mean 19 , 22 , 20 , 18 , 17 , 21 , 20 , 19 , 17

$19$ , $22$ , $20$ , $18$ , $17$ , $21$ , $20$ , $19$ , $17$

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

$\frac{19 + 22 + 20 + 18 + 17 + 21 + 20 + 19 + 17}{9}$

Simplify the numerator.

Add $19$ and $22$ .

$\frac{41 + 20 + 18 + 17 + 21 + 20 + 19 + 17}{9}$

Add $41$ and $20$ .

$\frac{61 + 18 + 17 + 21 + 20 + 19 + 17}{9}$

Add $61$ and $18$ .

$\frac{79 + 17 + 21 + 20 + 19 + 17}{9}$

Add $79$ and $17$ .

$\frac{96 + 21 + 20 + 19 + 17}{9}$

Add $96$ and $21$ .

$\frac{117 + 20 + 19 + 17}{9}$

Add $117$ and $20$ .

$\frac{137 + 19 + 17}{9}$

Add $137$ and $19$ .

$\frac{156 + 17}{9}$

Add $156$ and $17$ .

$\frac{173}{9}$

Divide.

$19.\overline{2}$

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.

$19.2$

Find the Mean 19 , 22 , 20 , 18 , 17 , 21 , 20 , 19 , 17

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