You measure 37 textbooks' weights, and find they have a mean weight of 73 ounces. Assume the population standard deviation is 11 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. .Give your answers as decimal, to two places.

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Q: How large is the sample if the confidence level is 97%, Ɛ = 2.5%  and ρ = .35?

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Q: You measure 43 dogs' weights, and find they have a mean weight of 34 ounces. Assume the population…

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