Find the Mean 1.2 , 4.4 , 5.7 , 7.4 , 7.4 , 4.2 , 2.2 , 4.2

$1.2$ , $4.4$ , $5.7$ , $7.4$ , $7.4$ , $4.2$ , $2.2$ , $4.2$

Step 1

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

$\frac{1.2 + 4.4 + 5.7 + 7.4 + 7.4 + 4.2 + 2.2 + 4.2}{8}$

Step 2

Simplify the numerator.

Add $1.2$ and $4.4$ .

$\frac{5.6 + 5.7 + 7.4 + 7.4 + 4.2 + 2.2 + 4.2}{8}$

Add $5.6$ and $5.7$ .

$\frac{11.3 + 7.4 + 7.4 + 4.2 + 2.2 + 4.2}{8}$

Add $11.3$ and $7.4$ .

$\frac{18.7 + 7.4 + 4.2 + 2.2 + 4.2}{8}$

Add $18.7$ and $7.4$ .

$\frac{26.1 + 4.2 + 2.2 + 4.2}{8}$

Add $26.1$ and $4.2$ .

$\frac{30.3 + 2.2 + 4.2}{8}$

Add $30.3$ and $2.2$ .

$\frac{32.5 + 4.2}{8}$

Add $32.5$ and $4.2$ .

$\frac{36.7}{8}$

Step 3

Divide $36.7$ by $8$ .

$4.5875$

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.

$4.59$

Find the Mean 1.2 , 4.4 , 5.7 , 7.4 , 7.4 , 4.2 , 2.2 , 4.2

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