12.

1 answer:

8 0

Last year, the average math SAT score for students at one school was 475. The headmaster then introduced a new teaching method hoping to improve scores. This year, the mean math SAT score for a sample of students was 491. The headmaster concluded that the new teaching method produces higher SAT scores. The problem with reporting results this way is voluntary response. The information of how the teaching method isnot mentioned.

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a) H0: μEuro - μChinese = 0 vs. Ha: μEuro - μChinese > 0

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Step-by-step explanation:

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Because in particular infants of the European infants are considered heavier. If not, the alternative hypothesis would be μEuro ≠ μChinese

or μEuro - μChinese ≠ 0.

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