Test Hypotheses About a Population Mean with Unknown
-A Manufacturer $\alpha = 0.05$

question 63

Short Answer

Test Hypotheses about a Population Mean with Unknown
-A manufacturer claims that the mean lifetime of its lithium batteries is 1000 hours. A homeowner selects 25 of these batteries and finds the mean lifetime to be 990 hours with a standard deviation of 80 hours. Test the manufacturer's claim. Use $\alpha = 0.05$ .

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Definitions:

Credits

Accounting entries that can either decrease assets or increase liabilities and equity on a company's balance sheet.

Debits

In accounting, an entry recorded on the left side of a double-entry bookkeeping system that increases an asset or expense account, or decreases equity, liability, or revenue accounts.

Debit

A debit is a bookkeeping entry that leads to an increase in a company's assets or expenses or a reduction in its liabilities or equity on the balance sheet.

Asset Accounts

Accounts that appear on a balance sheet and represent tangible and intangible items owned by a business that have value.