AP Statistics problem, confidence interval help

Posted on 2014-01-17 12:54:00 in Statistics by DUPER MAN

The question on my homework is the find the critical value t* for 95% confidence, n=73, I know how to find z* by hand and I know how to solve this with a t table but I want to know how to do it by hand like I can with z*. Or would it just be like z* because n is greater than 30? Any help would be great. :D

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