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Normal Distribution

Karansingh1984
Karansingh1984
Level I
Created: May 27, 2021 08:06 AM  |  Last Modified: Jun 8, 2023 5:34 PM 844 views

How I can say that my data are normally distributed using the distribution function?

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1 REPLY 1
statman
Super User statman
Super User


Re: Normal Distribution

May 27, 2021 08:29 AM (840 views)  |  Posted in reply to message from Karansingh1984 05-27-2021

Welcome to the community.  First the Normal distribution (Gaussian) is theoretical.  No data will ever be perfectly normal.  That being said there are number of indicators the distribution of your data is a close approximation of normal:

1. Visual look at the histogram....Bell shaped

2. Normal quantile plot...the dots should fall close to the straight line

3. Quantitative statistics...continuous fit>fit normal... Option>goodness of fit (Shapiro-Wilk, Anderson-Darling)

"All models are wrong, some are useful" G.E.P. Box

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