Ch. 9.1/9.2 Quiz

How do you find the mean of a set of numbers?

• Add all of the numbers up and then divide by the amount of numbers you have

• Do the largest number minus the smallest number

• Find the middle number

• Find the number that occurs most often

Another name for Mean is...

• Median

• Average

• Mode

Find the mean of 
9, 11, 2, 6

• 4
• 5
• 6
• 7

8. Find the mean.
120, 120, 90, 70

• 120
• 400
• 200
• 100

Find the mean for the number of dog walks per day.

• The mean is 20

• The mean is 4

• The mean is 5

• The mean is Wednesday.

The Yankees had the following wins over the last nine years;
89  103  95  97  95  85   84   87  84.
Find the mean. 

• 103
• 96
• 89
• 91

Find the mean of the data set:
34, 57, 58, 56, 21

• 45.2

• 56

• none

• 48

A(n) ____ of a data set is much greater or much less than the other data values.

• mean

• median

• mode

• outlier

Make a dot plot to identify any outliers in the following data.

52, 63, 55, 56, 62, 54, 59, 60, 53, 61, 88

• No outliers.

• 88 is an outlier.

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