Box-and-Whisker Plots

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Presentation transcript:

Box-and-Whisker Plots SWBAT interpret box-and-whisker plots; make box-and-whisker plots to show the distribution of data

Definitions Box-and-whisker plot Extremes Quartile Box Whiskers A way to organize data that shows the extremes, the median, and the quartile divisions Extremes The greatest and the least numbers in a data set Quartile Divided into four parts Box Drawn on top of the second and third quartiles Whiskers Show the first and fourth quartiles

Examples Data: 50 60 80 100 90 70 70 110 90 Draw a number line Find the mean Find the quartiles Mark the extremes Box the second and third quartiles Draw a line to connect the extremes to the box 40 50 60 70 80 90 100 110 120

Examples 40 50 60 70 80 90 100 110 120 Which characteristic of he box-and-whisker plot can be used to determine the range of the data? About how much data are in the box?

Examples What are the extremes of the data? 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 What are the extremes of the data? What is the median of the data? What are the upper and lower quartiles?

Examples Create a box-and-whisker plot for the data 35 30 20 25 30 25 15 45 50 30 97 76 84 112 93 68 88