Hi,
Not important, but IMHO the estimate component of the t.test holds an
estimate of mean of each group, never a difference. The doc says
"estimate the estimated mean or difference in means depending on
whether it was a one-sample test or a two-sample test."
> t.test(0:4)$estimate
mean of x
2
> t.test(0:4, 5:9)$estimate
mean of x mean of y
2 7
Best,
Samuel
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