Mean of Data Set

Find the mean of this data set:

13, 18, 13, 14, 13, 16, 14, 21, 13

The table shows the scores Ben, Brenna, Liza and Mark got on Math quiz.

Find their average (mean) score.

The table shows the amount of money Mr. William spent in one week.

Find the average amount of money he spent each day in dollars.

Sally went bowling with her friends on Saturday. She bowled 5 games and her scores were 149, 183, 149, 193, and 147.

About what is the mean of Sally's bowling scores?

Find the mean:

10, 5, 15, 20, 25, 35, 30

• 20

• 30

• 140

• 7

Find the mean of this data set:

2, 57, 38, 42, 6

• 29

• 38

• 50

• 145

Find the mean:

11, 10, 5, 2, 6, 10, 19

• 63

• 9

• 7

• 17

Summarizes data using a single number.  The single number is found by finding the sum of the data divided by the number of pieces of data.

• Median 

• Range

• Mean

• Mode

What is the mean of a data set?

• number used most often

• average

• number in the middle when ordered least to greatest

• difference of the highest and lowest values

Consider the two number sets. Which set has a higher mean and what is that mean?

Set 1: 10, 15, 20, 25, 30, 50

Set 2: 2,15, 22, 30, 42

• Set 1: 50

• Set 1: 25

• Set 2: 42

• Set 2: 30