Posted by **Jacob** on Thursday, June 17, 2010 at 10:44am.

Suppose a certain species bird has an average weight ofx=3.55 grams. Based on previous studies, we can assume that the weights of these birds have a normal distribution with 0=0.37 grams. For a small group of 15 birds, find the margin of error for a 70% confidence interval for the average weights of these birds. how do you work this formula for the given problem

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