A manufacturer is interested in the output voltage of a power supply used in a PC. Output voltage is assumed to be normally distributed with a standard deviation of 0.2 volt, and the manufacturer wishes to test H0: = 5 volts against H1: 5 volts, using n = 10 units. (a) The acceptance region is 4.80 5.20. Find the value of . (b) Find the power of the test for detecting a true mean output voltage of 5.1 volts.

H0: = 5 against H1: 5 when the sample is 16. What impact does the sample size have on the results of parts (a) and (b) of the previous problem? Use = 0.2. (a) The acceptance region is 4.80 5.20. Find the value of . (b) Find the power of the test for detecting a true mean output voltage of 5.1 volts. Use the same acceptance region.