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Researchers aim to study the weights of 10-year-old girls living in the United States (possibly to...

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Researchers aim to study the weights of 10-year-old girls livingin the United States (possibly to compare to other countries andthus compare growth rates). Based on previous studies, we canassume that weights of 10-year-old girls are Normal. From a smallsample of 16 girls, the researchers find a sample average of ?Ì… =91.4 pounds and a sample standard deviation of ? = 2.8 pounds.Create a 99% confidence interval for the true average weight of10-year-old girls in the U.S. (and make a formal conclusion basedon your calculated interval).

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4.1 Ratings (491 Votes)
Given that 914s 28n 16Degrees of freedom df n 1 16 1 15At 99    See Answer
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