### Home > MC2 > Chapter 1 > Lesson 1.1.3 > Problem1-18

1-18.

One of the ideas that you have explored in previous courses is how to describe a set of data. One of the ways that you may have seen before is finding an average (also called a mean). Read the Math Notes box for this lesson to review what a mean is and how to find it. Then find the mean for each set of data below.

1. Jane’s quiz scores: $82$, $64$, $73$, $91$, $85$

To find the average (mean), add all the values together and divide by the total number of values.

Find: $82+64+73+91+85$

Divide this total by the number of data values, in this case $5$.

$79$

2. The number of cats your teammates have as pets: $0$, $1$, $3$, $2$

To find the average, calculate

$\frac{0+1+3+2}{4}$

3. The number of minutes Pam talked on the phone: $35$, $40$, $12$, $16$, $25$, $10$

Look at the strategies in parts (a) and (b).