## Saturday, May 22, 2010

### Effects of Outliers

Find the mean, median, mode, range, and outliers of the following data sets.

a) 12, 20, 18, 15, 10, 12

First you have to reorder the data set from least to greatest. 10, 12, 12, 15, 18, 20

mean= 14.50 (always round to 2 decimal places.)

median= 13.5

mode= 12

range= 10

outlier(s)= none

b) 48, 32, 67, 47, 95, 89, 888, 1

First you have to reorder the data set from least to greatest. 1, 32, 47, 48, 61, 67, 89, 95, 888

mean= 147.56 (always round to 2 decimal places.)

median= 61

mode= 152.78

range= 887

outlier(s)= 1 and 888

Effects of Outliers

Some outliers need to be removed from a data set. This is typically a judgement call.

Outliers have an effect on all measures of central tendency.

Here is a link that may help you understand outliers better.

HOMEWORK: pgs. 444-445 1-8

#### 20 comments:

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