Quartiles of a Data Set

find the lower quartile of the following set of scores12, 9, 4, 6, 5, 8, 9, 4, 10, 2

• 10

• 4

• 9

• 6

Calculate the interquartile range of the following data:
17, 18, 18, 19, 20, 21, 21, 23, 25

• 3

• 4

• 5

• 8

What is the interquartile range of the data set below?

• 3

• 6

• 2

• 8

What is an interquartile range?

• The difference between the upper and lower quartiles.

• The measure of the middle half of the data.

• A measure of variability.

• All of the above

• None of the above

The values that divide a list of numbers into quarters

• quartile

• variability

• outlier

• box & whisker

When dividing a list of numbers into quartiles, how many groups will there be?

• 4

• 2

• 1

• 3

A graphic way to display the median, quartiles, and extremes of a data set on a number line to show the distribution of the data

• quartile

• box & whisker

• outlier

• statistical question

What is the upper quartile of the set of data; 2, 4, 6, 6, 7, 8, 10

• 4

• 6

• 8

• 2

Find First quartile Q1

• 20

• 30

• 35

• 45

What does point C on the box plot represent?

• First Quartile

• Median

• Third Quartile

• Mean