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Understanding Outliers

Explore outliers in data sets, identify them, and understand their impact on statistical measures for 6th graders.

Grade 6 Math Probability and StatisticsOutliers
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Includes

TextMultiple ChoiceFill in the Blanks2 Short AnswerTrue / False

Standards

CCSS.MATH.CONTENT.6.SP.A.3CCSS.MATH.CONTENT.6.SP.B.5.D

Topics

mathgrade 6outliersstatisticsdata analysis
8 sections · Free to use · Printable
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Understanding Outliers

Name:

Date:

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Read each question carefully and answer to the best of your ability. Show your work where necessary.

What is an outlier in a data set?

1. Which number is an outlier in the data set: 12, 15, 18, 14, 65, 13, 16?

a

12

b

18

c

65

d

13

2. In the data set: 5, 8, 10, 7, 9, 50, 6, which number is an outlier?

a

5

b

50

c

10

d

6

An outlier can significantly affect the   (mean/median) of a data set. It has less effect on the   (mean/median).

When an outlier is much larger than other data points, it will make the mean appear   (larger/smaller) than most of the data.

Consider the following test scores: 75, 80, 82, 78, 95, 15. Identify the outlier and explain how it affects the average score.

1. An outlier is always the largest number in a data set.

T

True

F

False

2. Removing an outlier from a data set can change its mean.

T

True

F

False

Create a data set of 5 numbers where one number is clearly an outlier. Explain why it is an outlier.