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Basic Statistics & Probability
Basic Statistics & Probability
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Box & Whisker Plots Examples Page 2

Page (2 of 2) Examples:   1    2  
Example 2

Answer the following questions, based on these box plots, on the amount of time boys and girls spend per day on social networking sites.

box whisker 5

box whisker 6

Approximate the girls' IQR and the boys' IQR.

a) The girls' lower quartile is about 1.25 hr/day and the upper quartile is about 3.5 hr/day.
The boys' lower quartile is about 0.6 hr/day and the upper quartile is about 1.35 hr/day.

Girls' IQR = 3.5 – 1.25 = 2.25 hours/day
Boys' IQR = 1.35 – 0.6 = 0.75 hours/day


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