Critical values

[ChrisHP]

I think we are at cross purposes, but just in case we're not, can you add numbers to your example so that I get the same answer as in my example.

For a sample of 8, at 95% confidence level, the critical value in my PMCC table is 0.6215.

Try as I might I can't get that value using the STUDENT_ICDF() function, and then calculating r from the resulting t value it returns.