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:

Budgeted Sales

The expected sales (in units or dollars) projected for a future period, often used for planning and performance evaluation.

Average Unit Price

The price per unit determined by dividing the total cost by the number of units purchased or produced.

Planned Objectives

Strategic goals set by a business or organization to guide its operations and decisions.

Controllable Margin

The portion of profit or margin that can be directly influenced by managing the controllable costs in a business.