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Averages and Probability

Completion requirements

Read this text. Pay close attention to the "How To" sections which give summaries of how to do mean, median, and mode calculations. After you read the text, complete the practice problems and check your answers.

Examples

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.

56 61 63 64 65 66 67 67
60 62 63 64 65
 66 67 70
60 63 63 64 66 66 67 74
61 63 64 65 66 67 67

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