Measures of Center and Spread

Mean

100

Find the mean for following set of data- 4,2,6,1,2

The answer is 3

200

What is another name for mean?

Average

300

Is the mean a measure of center or measure of variation?

Measure of Center

400

Find the mean for the following set of data- 54,32,41,49,86,72,39,36

51.125

500

What are the steps to find the mean?

Add all the numbers then divide by the amount of numbers

Median

100

Find the median for the following set of data- 11,13,16,17,18,20,21

17

200

Where is the median located?

Middle of the data

300

T/F Median is a Measure of Spread

False

400

Find the median for the following set of data- 21,3,14,35,9,4,10,9,30,25

12

500

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

Find their mean

Add them up and divide by 2

Mode

100

Find the mode of the data set- 7,9,8,5,8,4,7,3,6,9

7,8,9

200

What is mode?

Occurs most frequently

300

T/F There can only be one mode

False

400

Find the mode- 7,7,7,7,8,8,8,8,9,9,9,9,10,10,10,10

No mode

500

Can all the numbers be the mode?

No

M.A.D and IQR

100

Find the M.A.D- 4,2,6,1,2

1.6

200

Find the IQR- 11,13,16,17,18,20,21

7

300

Are M.A.D and IQR Measures of Center

No

400

Find the M.A.D- 15,26,16,30,24,19,35 (Round to the nearest tenth)

The rounded answer is 5.9

500

Find the IQR- 34,19,23,20,27,32

12

Range

100

Find the range- 25,14,36,19,30,20

22

200

How do you find the range?

Subtract the smallest number from largest number.

300

T/F Range is a Measure of Spread.

True

400

Find the range- 17,27,25,20,36,19,30,29,48

31

500

Find the range 20,20,20,20

0