Effect on Measures of Center

Effect on Measures of Center

​Complete your notes page & glue into math notebook

​9

​9

​9

​8

​9

​9

​a very low or high value is deleted or added

a middle data point or number of data points is changed

Multiple Choice

Extremely high or low values in a data set are called __________ .

• outliers

• median

• mode

• first quartile

Multiple Choice

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

Multiple Choice

Identify the outlier for the given data?
23, 34, 27, 7, 30, 26, 28, 31, 34

• 7

• 23

• 31

• 34

Multiple Choice

What measure of center is best to use when we have outliers?

• mean

• median

• mode

• range

Multiple Choice

Your math grades are {0, 80, 90, 90, 90, 100} If the outlier is removed, what will happen?

• The median will increase

• The median will decrease

• The mean will increase

• The mean will decrease

Multiple Choice

The number of miles that Mrs. Kidney cycled each week for a 7-week period is shown:

36, 42, 28, 52, 48, 36, 31

What is the median number of miles Mrs. Kidney cycled?

• 24

• 36

• 39

• 52

Multiple Choice

The number of pages that Maycee wrote in her journal each day from Monday to Friday is shown below:

9, 8, 12, 6, 10

What is the mean number of pages she wrote per day?

• 5

• 6

• 9

• 11

Multiple Choice

Use the table to find the mean

• 105

• 111

• 118

• 130

Multiple Choice

Find the Median of the data set

• 77

• 99

• 80

• 78.5

Multiple Choice

Find the Missing Value that would make the mean of the data set 25

• 22

• 23

• 24

• 26

Multiple Choice

Paulo got these grades in three tests: 72, 80 and 82. He had one more test to take. He wanted an average of 80 for the four tests. What mark must he get in the fourth test?

• 80

• 234

• It is not possible for him to get an 80 average

• 86

Multiple Choice

A data set consists of the numbers 2, 2, 5, 6 and 15.  Which statement is true for this data?

• median > mean

• mean = mode

• mode < median

• median = mode

Multiple Choice

Find the median, mode and range: 
3, 5, 7, 9, 11, 8, 3

• median:7  mode:3  range:7

• median:6  mode:3  range:7

• median:7  mode:3  range:8

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