Comments on: Normal Distribution | Examples, Formulas, & Uses https://www.scribbr.com/statistics/normal-distribution/ The checkpoint for your thesis Wed, 06 Jul 2022 13:33:47 +0000 hourly 1 https://wordpress.org/?v=6.0.2 By: Shona McCombes https://www.scribbr.com/statistics/normal-distribution/#comment-294382 Tue, 19 Jan 2021 13:16:23 +0000 https://www.scribbr.nl/?p=230722#comment-294382 In reply to Alan.

Hi Alan,

The phrasing “within 2 SDs” refers to the standard deviation on both sides of the mean – i.e., 68% of values fall between 1 SD below the mean and 1 SD above it, as shown on the graph. The same applies to the other numbers: 2 SDs below and 2 above the mean is a total range of 4 standard deviations.

I can see how this phrasing is confusing, so we’ll look into updating the article to clarify – but I hope that clears things up for now!

]]> By: Alan https://www.scribbr.com/statistics/normal-distribution/#comment-286120 Sun, 03 Jan 2021 06:38:27 +0000 https://www.scribbr.nl/?p=230722#comment-286120 SD here — 2, 4, 6 — is wrong for the empirical rule. Should be 1, 2, 3 like in the graph.

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