Box plot whisker details

Hello. I would like more details on what the whiskers in the box plot function specifies. Right now it says +/–2.7σ and 99.3 percent coverage. What percentile does this refer to?

Answer 1

[Cris LaPierre]

You trimmed the last part of the sentence off.

99.3 percent coverage if the data are normally distributed.

So, assuming your data is normally distributed, wisker to whisker covers 99.7% of the values you would expect to see. Remember, +/- 1 std is 68% 2 stds is 95%, and 3 stds is 99.7% of the data.