I'm taking a Probability and Statistics class. One of the questions in my exam was to find the value of t(0.9,25) using the 'Critical Values for t Distribution' table. However, since that table only shows values for alpha = 0.1 and below, I wasn't sure how to get a value for alpha = 0.9
I thought I could use symmetry so that t(0.9,25) = t(0.1,25), but got that question wrong. Could someone please tell me how I was supposed to do that question.