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

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Test Hypotheses about a Population Proportion
-According to a national statistics bureau, in 2000,3.7%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 α=0.1\alpha = 0.1 level of significance.


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