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According to the manufacturer, the normal output voltage for a particular device is 120 volts. From...

According to the manufacturer, the normal output voltage for a particular device is 120 volts. From a sample of 40 devices, the mean was found to be 123.59 volts and the standard deviation was 0.31 volt. The test statistic was then found to be 73.242. Use the test statistic and a 0.05 significance level to test the claim that the sample is from a population with a mean equal to 120 volts. State the initial and final conclusion

A: Reject the null hypothesis; there is not sufficient evidence to warrant rejection of the claim that the mean is 120 volts.

B: Reject the null hypothesis; there is sufficient evidence tow arrant a rejection of the claim that the mean is 120 volts.

C: Fail to reject the null hypothesis; there is sufficient evidence tow arrant a rejection of the claim that the mean is greater than 120 volts.

D: Fail to reject the null hypothesis; there is not sufficient evidence tow arrant a rejection of the claim that the mean is 120 volts.

Math   Statistics-And-Probability   
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