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ZeroDivisionError: 0.0 cannot be raised to a negative power #2

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ahbon123 opened this issue Nov 29, 2021 · 1 comment
Open

ZeroDivisionError: 0.0 cannot be raised to a negative power #2

ahbon123 opened this issue Nov 29, 2021 · 1 comment

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@ahbon123
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Sorry,

It raises the following error while I running DM test:

 DM_stat=V_d**(-0.5)*mean_d
ZeroDivisionError: 0.0 cannot be raised to a negative power

Could you help to handling this? Thanks.
@ZeliTheZealot
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It means that your variance estimate, V_d, is zero. According to the paper, in rare cases this can happen (negative or zero variance estimate). In this case you should simply immediately reject the null hypothesis.

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@ahbon123 @ZeliTheZealot