Mathematics, 21.03.2021 05:30 cdyshaylia55
A producer of various kinds of batteries has been producing "D" size batteries with a life expectancy of 87 hours. Due to an improved production process, management believes that there has been an increase in the life expectancy of their "D" size batteries. A sample of 36 batteries showed an average life of 88.5 hours. It is known that the standard deviation of the population is 9 hours.
a.
Give the null and the alternative hypotheses.
b.
Compute the test statistic.
c.
At the 1% level of significance using the critical value approach, test management's belief. What is the p-value and your conclusion?
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