how to create Chi squared distribution using mean and variance?

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Khoder Makkawi 2019-12-16

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编辑： Vladimir Sovkov 2019-12-16

Hello,

I have the mean and the variance for a Chi squared distribution.

I want to create this Chi squared distribution using the mean and the variance that I have, can I ?

Thank you.

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Vladimir Sovkov 2019-12-16

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https://ww2.mathworks.cn/matlabcentral/answers/496863-how-to-create-chi-squared-distribution-using-mean-and-variance#answer_406572

see https://www.mathworks.com/help/stats/chi-square-distribution-1.html

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Khoder Makkawi 2019-12-16

What I have is the mean and the variance of the distributed variable x.

What I want is to plot the Chi squared distribution that represents these data.

But I don't know how to do that using the mean and the variance.

Vladimir Sovkov 2019-12-16

编辑：Vladimir Sovkov 2019-12-16

If you want to approximate your x with the variance of 0.01 via chi^2, then it is quite impossible--the variance of chi^2 must be integer. If you want to construct the new chi^2 variable based on your x implying it is normally distributed - see my earlier comment.

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