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A researcher wants to test the claim that convicted burglars spend an average of 18.7 months...

A researcher wants to test the claim that convicted burglars spend an average of 18.7 months in jail. She takes a random sample of 11 such cases from court files and finds that x=21.5 months and s =7.4 months. Test the claim that µ= 18.7 months at the 0.05 significance level. Use the traditional method of testing hypotheses.

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