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i need help A sample of 17 of certain species of birds has an average weight of 3.85 grams. Based on previous studies, we can

i need help

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A sample of 17 of certain species of birds has an average weight of 3.85 grams. Based on previous studies, we can assume that the weights of population of these birds have a normal distribution with standard deviation of 0.29 grams. Find the margin of error for a 75% confidence interval for the average weight of the population of these birds

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