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:

Papillae

Small, nipple-like projections on the tongue where taste buds are located, contributing to the sense of taste.

Venous Patterns

The arrangement or distribution of veins in a part of the body, which may have diagnostic significance in certain medical conditions.

Bifid Uvula

A condition where the uvula is split or forked, often visible at the back of the throat; a congenital variation that is generally harmless.

Cleft Palate

A congenital deformity characterized by an opening or split in the roof of the mouth.