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

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

Step 1

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

$\frac{1.2 + 4.4 + 5.7 + 7.4 + 4.2 + 2.2 + 4.2}{7}$

Step 2

Simplify the numerator.

Add $1.2$ and $4.4$ .

$\frac{5.6 + 5.7 + 7.4 + 4.2 + 2.2 + 4.2}{7}$

Add $5.6$ and $5.7$ .

$\frac{11.3 + 7.4 + 4.2 + 2.2 + 4.2}{7}$

Add $11.3$ and $7.4$ .

$\frac{18.7 + 4.2 + 2.2 + 4.2}{7}$

Add $18.7$ and $4.2$ .

$\frac{22.9 + 2.2 + 4.2}{7}$

Add $22.9$ and $2.2$ .

$\frac{25.1 + 4.2}{7}$

Add $25.1$ and $4.2$ .

$\frac{29.3}{7}$

Step 3

Divide $29.3$ by $7$ .

$4.1\overline{857142}$

Step 4

Divide.

$4.18571428$

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.

$4.19$

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

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