A Producer of Various Kinds of Batteries Has Been Producing

question 83

Essay

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. Assume from past information that 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 99% confidence using the critical value approach, test management's belief.
d.What is the p-value associated with the sample results? What is your conclusion based on the p-value?

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Definitions:

Discharged By Frustration

A contract termination because an unforeseen event makes contractual obligations impossible to perform or drastically changes the party's principal purpose for entering into the contract.

Anticipatory Breach

An indication that one party intends not to fulfil their contractual obligations before the time of performance is due.

Freak Airplane Accident

An unusual and unexpected airplane incident resulting in damage or injury.

Contract Frustration

A legal concept that occurs when unforeseen circumstances prevent the fulfillment of a contract, thus releasing the parties from their contractual obligations.