Author Question: Perform a one-sample z-test for a population mean using the approach. Be sure to state the ... (Read 27 times)

shenderson6 · **on:** Apr 7, 2020

Perform a one-sample z-test for a population mean using the

approach. Be sure to state the hypotheses and the significance level, to compute the value of the test statistic, to obtain the

and to state your conclusion. Also, assess the strength of the evidence against the null hypothesis.

Last year, the mean running time for a certain type of flashlight battery was

This year, the manufacturer has introduced a change in the production method which he hopes will increase the mean running time. A random sample of

of the new light bulbs was obtained and the mean running time was found to be

Do the data provide sufficient evidence to conclude that the mean running time, μ, of the new light bulbs is larger than last year's mean of

Perform the appropriate hypothesis test using a significance level of 5%. Assume that

Carissamariew · **Reply #1 on:** Apr 7, 2020

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