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An automobile mileage study tested the following hypotheses.
Hypothesis:
H0:u>(or equal to) 25 mpg
Conclusion:
Manufacturer's claim supported
Ha: u < 25 mpg
Manufacturer's claim rejected; average mileage per gallon less than stated
For o~ = 3 and a .02 level of significance, what sample size would be recommended if the researcher wants 80% chance of detecting that u is less than 25 miles per gallon when it is actually 24?
Make a decision by computing the test statistic and comparing it to the decision rule spelling out in English just what the decision means in terms of the question in the problem.
question timescnn voter polls monitor public opinion for the presidential candidates during 2000 presidential
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