Measures of Variation

Mean

100

What are your steps to find the mean of a set of data?

1. Add up all of your data 2. Divide your answer by the number of numbers in your set of data 

200

Find the mean. 5,3,6,1,9

4.8

300

Find the mean. 36,42,56,58

48

400

Find the mean. 79,84,68,93

81

500

Find the mean. 52,41,63,95,51,74,75,53

63

Median

100

How do you find the median if there are two numbers in the middle?

1) Find the mean of the 2 numbers or

2) Find the middle of the two numbers.

200

Find the median. 3,8,2,4,9,5,6,9,7

6

300

Find the median. 12,11,9,14,18,16,9

12

400

Find the median. 12,11,32,11,12,15,51

12

500

What is the median? 52,41,63,95,51,74,75,53

58

Mode

100

What is the mode?

The most common number in the data set.

200

Name the 3 measures of center.

Mean, Median, and Mode

300

Find the mode. 44,54,24,36,68

No mode,

400

Find the mode. 45,33,99,4,45,52,33,15,45

Mode=45

500

Find the mode. 14,74,85,96,74,78,12,45,78

Mode = 74 and 78

MAD

100

What are the steps in finding the mean absolute deviation?

1. Find the mean 2. Find how far away each # from set is from the mean 3.Find the mean of the #s from step 2 

200

Find the MAD. (round to the nearest tenth) 5,8,9,8,2,5,8

2.1

300

Find the MAD. (round to the nearest tenth) 13,18,16,18,22,11

3

400

Find the MAD. (round to the nearest tenth 25,15,33,44,22,25

7.4

500

Find the MAD. (round to the nearest tenth) 103,91,74,86,96

8