Mean of Data

If the mean is 23, which number could b be?

Find the mean.

• 10

• 20

• 30

• 40

For this grouped data, what is the mean?

• 20

• 25

• 27

• 30

What is the second step in identifying grouped mean?

• Find the sum of the resulting column in preceding step.

• Multiply the frequency by the midpoint for each class. Place them in another column.

• Divide the sum obtained in preceding step by the total number of frequencies.

• Find the midpoint for each class (class mark). Place them in a column.

What does "mean" mean?

• average

• middle

• repeats the most

• variation

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 of the given data sets.

• 31

• 28

• 23

• 30