Complete the below:
Q1: The mean age of 25 randomly selected college seniors was found to be 23.5 years, and the standard deviation of all college seniors was 1.3 years. Which of the following is the correct symbol for 1.3 years?
A. m B. s C. s D.
Q2: A machine produces 3-inch nails. A sample of 10 nails was selected and the lengths determined. The results are as follows:
2.89 2.95 3.00 3.05 2.99 2.96 3.10 3.06 3.00 3.12
Use these results to test H0: m = 3 and Ha: m ¹ 3 at a = 0.01. Give the critical region, the computed test statistic, and the conclusion.