I can't find any no matter how hard I google. Every search result just tells me either how to calculate it on excel or explains what the p value is.
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Are you able to obtain the estimate for the trend line and the standard error by yourself? – Demetri Pananos Jun 21 '22 at 15:13
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Yes, I know how to find r^2, the slope and intercept, the standard error, as well as the standard deviation for both the input and output. – user361231 Jun 21 '22 at 15:14
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Can you also find the associated test statistic and degrees of freedom for that test statistic? – Demetri Pananos Jun 21 '22 at 15:36
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It's a Student test or, equivalently, an F test, as explained at https://stats.stackexchange.com/a/111616/919. Googling p value regression slope turns up pages of instructions: take your pick. – whuber Jun 21 '22 at 17:23