A hypothesis test if is set up as follows:

1: <7.9 vs. 0: = 7.9 14 measurements give an average = 7.75. It is known that = 0.3. The test must be performed with a significance level = 5%. a) Determine critical value, .Round your answer to 2 decimal places. Submit a response

b) What is the strength of the test if 1: = 7.66 is true? Round your answer to 4 decimal places.