Complete parts (a) through (c) below. (a) Determine the critical value(s) for a

Question

Complete parts (a) through (c) below. (a) Determine the critical value(s) for a right-tailed test of a population mean at the alpha equals0.01 level of significance with 20 degrees of freedom. (b) Determine the critical value(s) for a left-tailed test of a population mean at the alpha equals0.01 level of significance based on a sample size of nequals 15 . (c) Determine the critical value(s) for a two-tailed test of a population mean at the alpha equals0.05 level of significance based on a sample size of nequals 17 . LOADING... Click here to view the t-Distribution Area in Right Tail. (a) t Subscript crit equals minus plus or minus plus nothing (Round to three decimal places as needed.)

Explanation / Answer

Answer to the question are as follows:

I have used the t-tables to solve the problem:

?(a) Determine the critical? value(s) for a? right-tailed test of a population mean at the alpha equals0.01 level of significance with 20 degrees of freedom.

For a df = 20-1 = 19 and alpha = .01 we have t = 2.539

?(b) Determine the critical? value(s) for a? left-tailed test of a population mean at the alpha equals0.01 level of significance based on a sample size of nequals 15 .

For a df = 15-1 = 14 and alpha = .01 we have t = - 2.624

?(c) Determine the critical? value(s) for a? two-tailed test of a population mean at the alpha equals0.05 level of significance based on a sample size of nequals 17

For a df = 17-1 = 16 and alpha = .05 we have t = 2.145

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