In the Past,the Mean Battery Life for a Certain Type $8.8 \text { hours. }$

question 55

Multiple Choice

In the past,the mean battery life for a certain type of flashlight battery has been $8.8 \text { hours. }$ The manufacturer has introduced a change in the production method and wants to perform a hypothesis test to determine whether the mean battery life has increased as a result.The hypotheses are: H0 : ? = 8.8 hours
HA : ? > 8.8 hours
Explain the result of a Type I error.

• A)The manufacturer will decide the mean battery life is 8.8 hours when in fact it is greater than 8.8 hours.
• B)The manufacturer will decide the mean battery life is 9.6 hours greater than it was prior to the change in the production method.
• C)The manufacturer will decide the mean battery life is 9.6 hours lower than it was prior to the change in the production method.
• D)The manufacturer will decide the mean battery life is greater than 8.8 hours when in fact it is greater than 8.8 hours.
• E)The manufacturer will decide the mean battery life is greater than 8.8 hours when in fact it is 8.8 hours.

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Definitions:

Unit Cost

The cost incurred to produce, store, or acquire one unit of a product or service.

Cost of Goods Sold

The direct costs attributable to the production of goods sold by a company, including material and labor expenses.

Time Ticket

A document that indicates the employee, the hours worked, the account and job to be charged, and the total labor cost.

Personal Exemptions

Deductions allowed on individual income tax returns, reducing the amount of income subject to taxation, based on the taxpayer and dependents.