Question

0,509,0.67 2 2. (2 points) Using the t-Distribution Tables, find the critical t-value that corresponds to a 99% confidence, with n=20.

Answer 1

sample size (n) = 20

degrees of freedom = (n-1) = (20-1) = 19

t critical value for 99% confidence level be:-

t* = 2.861

[ using t distribution table, for df = 19, alpha= 0.01, both tailed test ]

***just for your clarification,

t critical value for df = 19, alpha= 0.01, one tailed test be:-

** = 2.539

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