Grade 8 Math: Center and Spread

A worksheet for 8th-grade students covering measures of center (mean, median, mode) and spread (range, interquartile range) with real-world data sets.

Grade 8 Math Probability and StatisticsCenter and Spread

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Includes

2 Short AnswerCustomMultiple Choice

Standards

CCSS.MATH.CONTENT.8.SP.A.1CCSS.MATH.CONTENT.8.SP.A.2

Topics

mathgrade 8statisticscenterspreadmeanmedianmoderangeinterquartile range

6 sections · Free to use · Printable

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Grade 8 Math: Center and Spread

Name:

Date:

Score:

Read each question carefully and provide your answers in the spaces provided. Show all your work for calculations.

1. The following are the scores of 10 students on a math test: 78, 85, 92, 78, 95, 80, 88, 78, 90, 85. Calculate the mean, median, and mode for this data set.

Mean:

Median:

Mode:

2. A small business recorded the number of customers it served each day for a week: 25, 30, 22, 28, 35, 30, 26. What is the mean number of customers served per day?

3. The weights (in pounds) of five puppies in a litter are: 5.2, 6.1, 5.5, 6.5, 5.8. Calculate the range of these weights.

4. Find the interquartile range (IQR) for the following data set representing the number of books read by students in a month: 3, 5, 2, 8, 4, 10, 6, 7, 9.

5. The bar graph below shows the number of hours spent studying by a group of students for an exam.

a) What is the mean number of hours studied by these students?

b) What is the median number of hours studied?

c) What is the range of hours studied?

6. Which measure of spread is most affected by outliers?

Mean

Median

Range

Interquartile Range (IQR)