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Find the Mean 12 , 14 , 16 , 18 , 12 , 21 , 10

$12$ ,

$14$ ,

$16$ ,

$18$ ,

$12$ ,

$21$ ,

$10$

Step 1

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

$\frac{12 + 14 + 16 + 18 + 12 + 21 + 10}{7}$

Step 2

Simplify the numerator.

Add

$12$ and

$14$ .

$\frac{26 + 16 + 18 + 12 + 21 + 10}{7}$

Add

$26$ and

$16$ .

$\frac{42 + 18 + 12 + 21 + 10}{7}$

Add

$42$ and

$18$ .

$\frac{60 + 12 + 21 + 10}{7}$

Add

$60$ and

$12$ .

$\frac{72 + 21 + 10}{7}$

Add

$72$ and

$21$ .

$\frac{93 + 10}{7}$

Add

$93$ and

$10$ .

$\frac{103}{7}$

Step 3

Divide.

$14.71428571$

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.

$14.7$

Find the Mean 12 , 14 , 16 , 18 , 12 , 21 , 10

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