Exercise 1 Page 862

Mean of a data set is the sum of all values in the set divided by the number of values in the set. In this case, there are

6

values in the set, so we should divide the sum by

6 .

Let's go!

Mean = \frac{Sum of values}{Number of values}

Substitute values

Mean = \frac{8 + 1 3 + 2 1 + 1 2 + 2 9 + 1 3}{6}

Add terms

Mean = \frac{9 6}{6}

Calculate quotient

Mean = 16