MATLAB: How to tell a set of data is normally distributed

normal distributionstatistics

Thanks

Best Answer

normplot(x)

And for formal tests, see lillietest and jbtest

(NB: these are all Statistics Toolbox functions. If you're doing this kind of statistical work, though, I assume you have that.)

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MATLAB: Normally distributed demand data

You can use the randn function to generate random numbers.

n=300;%number of cases
minval=0;%lowest allowed integer
maxval=1000;%highest allowed integer
mu=50;%median value of distribution
sd=50;%standard deviation of distribution
data=floor(mu+sd*randn(n,1));%round down to integers
invalid= data<minval | data>maxval;
while any(invalid)
    %replace invalid values with newly generated values
    %this will bias the distribution
    data(invalid)=floor(mu+sd*randn(sum(invalid),1));
    invalid= data<minval | data>maxval;
end

MATLAB: Which test should I select to see if the data is normally distributed

Hello, Pilar,

From what I can tell, the Distribution Fitter app is what you're looking for.

Here's a tutorial for using it: https://www.mathworks.com/help/stats/fit-a-distribution-using-the-distribution-fitting-app.html

Let me know if this helps!

Best Answer

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MATLAB: Normally distributed demand data

MATLAB: Which test should I select to see if the data is normally distributed

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