1.5 times the interquartile range from the box is 1.5 * 5.6481939 = 8.472291

The top of the box is 24.18153

31.22629 – 24.18153 = 7.04476.

7.04476 < 8.472291, therefore it becomes the whisker. Hope that clears it up.

]]>With the 25 and 75 percentiles, IQR = 5.6481939. Median + 1.5 IQR = 20.759577 + 1.5(5.6481939) = 29.23186785.

The top whisker however is 31.22. Why is this mismatch between expected and reported top/bottom whiskers ?

]]>Hope that helps.

]]>I found you after having read several articles you wrote on analyzing Categorical data using R posted on the UVa Library Services website. On two occassions now I was at a loss trying to understand what my professor (or Agresti) was talking about (or why it mattered). Then I read your articles working through basic analyses and afterwards engaging with the finer details in my notes and the textbook made a lot more sense. Thanks for taking the time to write so clearly. I appreciate it.

Regards,

Kyle

]]>I found your blog in a search for resources addressing the generation of (fake) data for analysis. Are you aware of any texts that treat this subject from an introductory level, including understanding and choosing appropriate probability distributions, etc.)?

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