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Suppose a certain species bird has an average weight of $ = 3.55 grams. Based on previous studies, we can assume that the weights of

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Suppose a certain species bird has an average weight of $ = 3.55 grams. Based on previous studies, we can assume that the weights of these birds have a normal distribution with o = 0.29 grams. Find the sample size . necessary for an 85% confidence level with a maximal error of estimate E = 0.09 for the mean weights of the hummingbirds. 5 O 47 10 10 O 100

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