Question

10.3
Complete parts (a) through (c) below. (a) Determine the critical value(s) for a right-tailed test of a population mean at the a = 0.01 level of significance with 15 degrees of freedom. (b) Determine the critical value(s) for a left-tailed test of a population mean at the a = 0.01 level of significance based on a sample size of n = 10. (c) Determine the critical value(s) for a two-tailed test of a population mean at the a = 0.05 level of significance based on a sample size of n= 11.
Thank you:)

Answer 1

1. (a) 2.602

(b) 2.821

(c) 2.228

2. to = 1.29

3. to = -6.71

4.

(b)

21.571	confidence interval 95.% lower
31.229	confidence interval 95.% upper

5. to = 1.89