Complete parts a through c below Determine the critical valu

Complete parts (a) through (c) below. Determine the critical value(s) for a right-tailed test of a population mean at the alpha = 0.10 level of significance with 20 degrees of freedom. Determine the critical value(s) for a left-tailed test of a population mean at the alpha = 0.05 level of significance based on a sample size of n = 15. Determine the critical value(s) for a two-tailed test of a population mean at the alpha = 0.01 level of significance based on a sample size of n = 12.

Solution

a)

Using table/technology,

tcrit = 1.325340707 [ANSWER]

**************

B)

Using table/technology,

tcrit = 1.761310136 [ANSWER]

***************

c)

Using table/technology,

tcrit = 3.105806516 and -3.105806516 [ANSWER]