Mean and Outlier

By how much will the mean vary if the outlier is included?

75, 65, 77, 69, 34, 82, 64

• 5.4

• 72

• 66.6

• 5.9

By how much will the mean weights vary if the outlier is included?

84, 74, 86, 78, 40, 91, 73

• 6.4

• 75.1

• 5.9

• 81

The price of a cheese pizza in five different pizza delivery shops are 5, 5, 4, 6, 6, 8, and $7. Find the mean price of a cheese pizza.

• $7

• $4

• $5

• $6

the number of roses grown in each garden in a particular month is represented in a pictograph. What is the mean number of roses grown in that month?

• 70

• 7

• 20

• 280

Which measure of central tendency is most appropriate for a data that describes the heights of grade 5 students?

• Mode

• Outlier

• Mean

• Median

The temperature received till Friday was 34, 38, 36, 30 and 31. If the temperature on Saturday drops to 11^oC, how does the inclusion of Saturday's temperature affect the weekly mean temperature?

• increase

• decreases

• does not change

• can not be determined

The MEAN is the most effective measure of central tendency EXCEPT when _?

• when an outlier is present in the data set

• when there is no mode

• when there is NOT an outlier in the data set

• When the range is not measureable

Kayte took a sample of 50 pieces of data.  She added up all of the pieces of data and then divided by 50.  What measure of center is she working on?

• Mean

• Median

• Mode

• Range

What is the outlier in the following data?

• 22

• 8

• 37

• 22

What is the mean of the data set without the outlier(s)?

• 9.2

• 9.7

• 11.1

• 12.4