Averages and Probability

Example 5.49

Find the mean of the numbers $8, 12, 15, 9, \text{and }6$.

Example 5.50

The ages of the members of a family who got together for a birthday celebration were $16, 26, 53, 56, 65, 70, 93, \text{and }97$ years. Find the mean age.

Example 5.51

For the past four months, Daisy's cell phone bills were $$42.75, $50.12, $41.54, $48.15$. Find the mean cost of Daisy's cell phone bills.

Example 5.52

Find the median of $12, 13, 19, 9, 11, 15, \text{and }18$.

Example 5.53

Kristen received the following scores on her weekly math quizzes:

$83, 79, 85, 86, 92, 100, 76, 90, 88, \text{and }64$. Find her median score.

Example 5.54

The ages of students in a college math class are listed below. Identify the mode.

$18, 18, 18, 18, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 21, 21, 22, 22, 22, 22, 22, 23, 24, 24, 25, 29, 30, 40, 44$

Example 5.55

The data lists the heights (in inches) of students in a statistics class. Identify the mode.