Determine the appropriate critical values for each of the fo

Determine the appropriate critical value(s) for each of the following tests concerning the population mean. (Hint: z or t) a. Right-tailed test; alpha = 0.025; n = 25; sigma = 3.0 b. Left-tailed test; alpha = 0.05; n = 30; s = 9.0 c. 2 tailed test; alpha = 0.10; n = 36; sigma = 3.8 d. 2 tailed test; alpha = 0.02; n = 51; s = 6.5

Solution

a) z for alpha=0.025 is 1.959964........
b) t for alpha=0.05 is -1.6991.....
c) z for aplha 0.10 is + or - 1.644854......
d) t for alpha 0.02 is + or - 2.4033...