Consider a sample of n = 16 selected from a normal population, X = 56 and S = 12.

1. What is the value of tSTAT if you are testing the null hypothesis H0: = 50?

2. How many degrees of freedom are there in the t-test?

3. What are the critical values of t if the level of significance, , is 0.05 and the alternative

hypothesis, H1, is 50?

4. What is your statistical decision if the alternative hypothesis, H1 is 50?

5. If in a sample of n = 16, selected from a left skewed population, X = 65 and S = 21, would you use

the t-test to test the null hypothesis, H0 = = 60? Discuss.

6. If, in the sample of n = 160 selected from a left skewed population,