Test Hypotheses About a Population Proportion
-According to a National $2000,3.7 \%$

question 74

Short Answer

Test Hypotheses about a Population Proportion
-According to a national statistics bureau, in $2000,3.7 \%$ of males living in the Southwest were retired exterminators. A researcher believes that the percentage has increased since then. She randomly selects 250 males in the Southwest and finds that 4 of them are retired exterminators. Test this researcher's claim at the $\alpha = 0.1$ level of significance.

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Definitions:

Volcanic Fluids

Liquid substances, including magma, water, and gases, that are emitted by a volcano during an eruption.

Steep Slopes

Land areas with a sharp incline, prone to erosion, landslides, and offering distinct ecosystems and geological formations.

Island Arc

A curved chain of volcanic islands located at a tectonic plate boundary, typically formed from the subduction of an oceanic plate under another plate.

Mid-Ocean Ridge

A global chain of mountains beneath the sea, created by the movement of Earth's plates.