Outlier and Mean

The data set below has an outlier of 42.
2, 5, 12, 15, 19, 4, 6, 11, 16, 18, 12, 12, 42
What effect does removing the outlier have on the distribution of the data?

• The mean will decrease

• The median will decrease

• The mean will increase

• The median will increase

Using the information below, identify which of the following is NOT an outlier:
Q1 = 53
Q2 = 55
Q3=61

• 73

• 40

• 80

• 73.5

Given the following data set 6, 9, 12, 14, 7, 9, 6, 8, 25, 12, 14 What is the mean of the data set without the outlier(s)?

• 9.2

• 9.7

• 11.1

• 12.4

A value that is much higher or much lower than the other values in a set of data.

• Outlier

• Mean

• Median

• Mode

Given the following data set
6, 9, 12, 14, 7, 9, 6, 8, 25, 12, 14
What is the mean of the data set without the outlier(s)?

• 9.2

• 9.7

• 11.1

• 12.4

A bowler had the following scores: 196, 205, 197, 300 and 202. What is the difference between the mean with the outlier and the mean without the outlier?

• 13

• 16

• 19

• 20

A bowler had the following scores: 196, 205, 197, 280 and 202. What is the difference between the mean with the outlier and the mean without the outlier?

• 13

• 16

• 19

• 22

Which scenario is most likely to have outliers?

• Ages in a senior citizen community

• Heights of adult males

• Test scores where most are 90% but a few below 50%

• Number of pages in novels

For a particular area, the monthly rainfall totals (in inches) are recorded. Which of the following BEST describes what would happen to the mean if April were removed from the data?

• The mean would decrease

• The mean would increase

• The mean would stay the same

• The mean would become an outlier

For a particular area, the monthly rainfall totals (in inches) are recorded. Which of the following BEST describes what would happen to the mean if April were removed from the data?

• The mean would decrease

• The mean would increase

• The mean would stay the same

• The mean would become an outlier