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Statistics: Testing a claim About a mean of voltage from UPS

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According to a Data Set, the list measures voltage amounts obtained from the author's back-up UPS (APC model CS 350). According to the manufacturer, the normal output voltage is 120 volts. The 40 measured voltage amounts from the data set have a mean of 123.59 volts and a standard deviation of 0.31 volt. Use a 0.05 significance level to test the claim that the sample is from a population with a mean equal to 120 volts.

(i) H0: µ =

(ii) H1: µ =

(iii) Critical values: t =

(iv) Test statistic [Show procedure.] t =

(v) P-value:

(vi) Final conclusion (in the words of the problem):

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The expert examines testing a claim about a mean of voltage from UPS. The hypothesis is examined.

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According to a Data Set the list measures voltage amounts obtained from the author's back-up UPS (APC model CS 350). According to the manufacturer, the normal output voltage is 120 volts. The ...

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