Median and Quartiles

A measure of variation in a set of numerical data, it is the distance between the first and third quartiles of the data set.

• Interquartile Range

• Outliers

• First Quartile

• Third Quartile

For a data set with median M, it is the median of the data values greater than M.

• Interquartile Range

• Outliers

• First Quartile

• Third Quartile

For a data set with median M, it is the median of the data values less than M.

• Interquartile Range

• Outliers

• First Quartile

• Third Quartile

What is the interquartile range of the data set below?

• 3

• 6

• 2

• 8

The median is always equal to one of the values in the data set.

• True

• False

What is another name for Q₁ ?

• Lower Quartile

• Upper Quartile

• Median

• Minimum

• Maximum

Quartiles are all worth ______ percent.

• 50%

• 33%

• 25%

• 10%

What is the Upper Quartile?

• 70

• 80

• 93

• 99

What is the median number of points scored per game?

• 5

• 10

• 17

• 32

When creating a box and whisker plot from a set of data, what is the first thing you find?

• Median

• Upper Quartile

• Lower Quartile

• None of these