Critical values

[ChrisHP]

I'm trying to find the critical values that are in the "Product Moment Correlation Coefficient" tables (sometimes also called Pearson Moment Correlation Coefficient).

The table holds values by number of items (n) and the confidence level (typically 0.1, 0.05, 0.01, 0,001)

example table here

Table

e.g when n is 8, at 0.05 confidence (one tailed test), the value is 0.621, and it's this value I want the calculator to give me