Finite Math Examples

$15.2$ , $18.8$ , $19.3$ , $19.7$ , $20.2$ , $21.8$ , $22.1$ , $29.4$

Step 1

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

$\frac{15.2 + 18.8 + 19.3 + 19.7 + 20.2 + 21.8 + 22.1 + 29.4}{8}$

Step 2

Simplify the numerator.

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Step 2.1

Add $15.2$ and $18.8$ .

$\frac{34 + 19.3 + 19.7 + 20.2 + 21.8 + 22.1 + 29.4}{8}$

Step 2.2

Add $34$ and $19.3$ .

$\frac{53.3 + 19.7 + 20.2 + 21.8 + 22.1 + 29.4}{8}$

Step 2.3

Add $53.3$ and $19.7$ .

$\frac{73 + 20.2 + 21.8 + 22.1 + 29.4}{8}$

Step 2.4

Add $73$ and $20.2$ .

$\frac{93.2 + 21.8 + 22.1 + 29.4}{8}$

Step 2.5

Add $93.2$ and $21.8$ .

$\frac{115 + 22.1 + 29.4}{8}$

Step 2.6

Add $115$ and $22.1$ .

$\frac{137.1 + 29.4}{8}$

Step 2.7

Add $137.1$ and $29.4$ .

$\frac{166.5}{8}$

Step 3

Divide $166.5$ by $8$ .

$20.8125$

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.

$20.81$