Test on Measure of Variability

What is the interquartile range (IQR)?

• 4

• 64

• 60

• 8

The interquartile range (IQR) of a data set is the difference between the third and first quartiles. It represents the range of the middle half of the data.

• True

• False

Ms. Rork's class had a range of test grades from 78 to 97. She forgot to add in a student who got an 80% on the test. How will this affect the range?

• Increase

• Decrease

• Stay the Same

What is the interquartile range?

• 3

• 6

• 4

• 5

Which measure of variability should you use?

• IQR

• standard deviation

Which of the following is a measure of variability?

• Range

• Median

• Mode

• Mean

• Dot Plot

You should use (a)   as the measure of variability.

• IQR

• standard deviation

Look at the image above. Which measure of variability should you use?

• Mean

• MAD

• IQR

• Median

Which measure of variability should you use?

• IQR

• standard deviation

Given the dot plot's shape, what measure of variability should be used?

• Mean

• Median

• Standard Deviation

• IQR