For each scenario described below, identify the null hypothesis (H_o) and the al

Question

For each scenario described below, identify the null hypothesis (H_o) and the alternative hypothesis (H_a). According to a Gallup poll conducted in 2008,78% of Americans felt satisfied with the way things were going in their personal lives. A researcher wonders of the percentage satisfied is different today. Federal law requires that a jar of peanut butter that is labeled as containing 32 ounces must contain at least 32 ounces. A consumer protection organization thinks that the manufacturer of one brand of peanut butter is short changing customers by intentionally under filling the jars. The mean score on the SAT Math reasoning exam is 516. A test preparation company claims that students who take their test preparation course get a higher score on the exam.

Explanation / Answer

a)

Ho: p = 0.78
Ha: p =/= 0.78

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b)

Ho: u >= 32 oz
Ha: u < 32 oz

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c)

Ho: u <= 516
Ha: u > 516

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