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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.

Thank you.

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 This kind of question is not really appropriate for MO. As the FAQ suggests, it might be better suited for math.stackexchange.com. – Qiaochu Yuan Aug 3 2010 at 4:29
I've closed this question, because it is not appropriate for MathOverflow. If you look at the FAQ, you should find some web sites where your question might be more welcome. – S. Carnahan♦ Aug 3 2010 at 5:30

closed as off topic by Qiaochu Yuan, S. Carnahan♦ Aug 3 2010 at 5:29

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