Refer to Exercise 10.19. Construct a 95% upper confidence
Chapter 10, Problem 49E(choose chapter or problem)
Problem 49E
Refer to Exercise 10.19. Construct a 95% upper confidence bound for the average voltage reading.
a How does the value μ = 130 compare to this upper bound?
b Based on the upper bound in part (a), should the alternative hypothesis of Exercise 10.19 be accepted?
c Is there any conflict between the answer in part (b) and your answer to Exercise 10.19?
Reference
The output voltage for an electric circuit is specified to be 130. A sample of 40 independent readings on the voltage for this circuit gave a sample mean 128.6 and standard deviation 2.1. Test the hypothesis that the average output voltage is 130 against the alternative that it is less than 130. Use a test with level .05.
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