STAB22H3 Chapter 5: Chapter 5 Notes
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STAB22H3 Full Course Notes
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Different ways of examining the relationship between two variables when one is quantitative and the other is categorical and indicates groups to compare. The box can have an width: to help construct the boxplot, we erect fences around the main part of the data. Upper fence- 1. 5 iqrs above the upper quartile. Lower fence- 1. 5 iqrs below the lower quartile. The fences are just for construction and not part of the display. Never include them in the final boxplot: we use the fences to grow whiskers . Draw lines form the ends of the box up and down to the most extreme data values found within the fences. If a data value falls out of one of the fences do not connect it with a whisker: finally we display any data values lying beyond any fences with special symbols. We sometimes use a different symbol for far outliers data values farther than 3 iqrs from the quartiles.
