# Box and Whisker Plots Measures of Central Tendency.

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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

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, 22 Minimum- Lower quartile- Median- Upper quartile- Maximum-

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