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Find the Mean 1 , 2 , 1 , 2 , 1 , 3 , 3 , 4 , 3

$1$ ,

$2$ ,

$1$ ,

$2$ ,

$1$ ,

$3$ ,

$4$ ,

$3$

Step 1

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

$\frac{1 + 2 + 1 + 2 + 1 + 3 + 3 + 4 + 3}{9}$

Step 2

Simplify the numerator.

Add

$1$ and

$2$ .

$\frac{3 + 1 + 2 + 1 + 3 + 3 + 4 + 3}{9}$

Add

$3$ and

$1$ .

$\frac{4 + 2 + 1 + 3 + 3 + 4 + 3}{9}$

Add

$4$ and

$2$ .

$\frac{6 + 1 + 3 + 3 + 4 + 3}{9}$

Add

$6$ and

$1$ .

$\frac{7 + 3 + 3 + 4 + 3}{9}$

Add

$7$ and

$3$ .

$\frac{10 + 3 + 4 + 3}{9}$

Add

$10$ and

$3$ .

$\frac{13 + 4 + 3}{9}$

Add

$13$ and

$4$ .

$\frac{17 + 3}{9}$

Add

$17$ and

$3$ .

$\frac{20}{9}$

Step 3

Divide.

$2.\overline{2}$

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.

$2.2$

Find the Mean 1 , 2 , 1 , 2 , 1 , 3 , 3 , 4 , 3

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