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Finding Average (Mean)

This worksheet helps 8th-grade students practice calculating the mean (average) of various data sets, including word problems and data from bar graphs.

Grade 8 Math Probability and StatisticsFinding Average
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Includes

2 Short AnswerFill in the Blanks2 CustomTrue / False

Standards

CCSS.MATH.CONTENT.6.SP.B.5.CCCSS.MATH.CONTENT.7.SP.B.4

Topics

mathgrade 8averagemeanstatisticsdata
8 sections · Free to use · Printable
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Finding Average (Mean)

Name:

Date:

Score:

Read each question carefully and calculate the average (mean) for each set of numbers. Show your work where applicable.

1. Find the mean of the following set of numbers: 12, 18, 15, 20, 10.

2. Calculate the average of these test scores: 85, 92, 78, 95, 88, 90.

3. To find the mean, you need to first   all the numbers in the set and then   by the   of numbers in the set.

4. If the sum of 5 numbers is 75, then their average is  .

5. Sarah recorded the number of books she read each month for six months: 4, 7, 3, 5, 8, 3. What is the average number of books she read per month?

6. A baker sold 120 cupcakes on Monday, 150 on Tuesday, 130 on Wednesday, and 160 on Thursday. What is the average number of cupcakes sold per day for these four days?

7. The bar graph below shows the number of hours students spent studying for a math test. Calculate the average number of hours spent studying.

Hours Spent Studying0123453Student A5Student B2Student C4Student D1Student E

8. The mean is always one of the numbers in the data set.

T

True

F

False

9. Adding a very large number to a data set will significantly increase its mean.

T

True

F

False

10. The average height of 4 friends is 150 cm. If a fifth friend who is 160 cm tall joins the group, what will be the new average height of the five friends?