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In our bakery, a sample of 60 loaves of bread is found to have a mean weight of 35 ounces with a standard deviation of 1.21 ounces.

a. Using the sample, determine a 98% confidence interval for the mean weight of the entire daily output.

b. Determine how large a sample should be taken to be 90% confident that the sample mean is within 0.12 ounces of the true mean weight of our bakery's loaves.

c. Would we be guilty of false advertising if we claimed a 2 lb. loaf?

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