Obtaining the P values for the t stat

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Ahmed Abdulla
Ahmed Abdulla 2020-6-10
评论： Km Shraddha 2025-1-14
I have both the tstat and the degrees of freedom, is there a quick way to find the P value of a two tailed hypothesis at a significance of 0.05

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dpb
dpb 2020-6-10
p = 1-tcdf(t,n-1) % Probability of larger t-statistic
requires Statistics Toolbox...
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Jamol Bahromov
Jamol Bahromov 2021-9-17
Shouldn't p multiplied by two for a two-tailed p-value?
O.Hubert
O.Hubert 2022-10-24
It should be noted that t should be positive to obtain sensible results and yes, p should be multiplied by 2 to get a two-tailed test.
To have t positive, replace it by abs(t).

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