Box and Whisker Plots

Measures of Central Tendency

Definitions

* Minimum- ________________________

* ____________________- the value that exactly 25% of the data values lie below and 75% lie above. AKA the first quartile

* ____________- The middle number (50% above and below). AKA the second quartile

Definitions

* _____________-the value such that 75% of the data values lie below and 25% lie above. AKA the third quartile

* Maximum-________________________

* Range- __________________________

“About The Box”

5 number summary- the minimum, lower quartile, median, upper quartile and maximum

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Median

To calculate the median of a set of data..

1.) Arrange the data from _________ to ___________

2.) If there is an _______ number of values, take the __________ number

3.) If there is an __________ number of values, take the __________ of the middle two.

Example

Find the 5 number summary of the following set of data values:

2, 4, 9, 13, 16, 22Minimum-Lower quartile-Median-Upper quartile-Maximum-

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Identify the 5 number summary:

Minimum-Maximum-Lower Quartile-Upper Quartile-Median-

Interquartile Range

______________________- the upper quartile minus the lower quartile. This is the “box” part of the box-and-whisker plot. 50% of the data values lie within this range

Example:

Construct a box and whisker plot from the following set of data values:

Minimum- 23Lower quartile- 38Median- 49Upper quartile- 52Maximum- 63

Answer: