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. (a) Test the hypothesis that the average output voltage is 130 against the alternative that it is iess than 130. Use a test with level .05. Report the p-value as well: (b) Determine B of the test above for alternate hypothesis H. : µ = 129.

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