Get the step by step solution to this homework question now: A random sample of 15 miniature Tootsie Rolls was taken from a bag. Each piece was...

Get the step by step solution to this homework question now:A random sample of 15 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were as given in the table at right.(a) Construct a 90 percent confidence interval for the true mean weight. (b) What sample size would be necessary to estimate the true weight with an error of 0.02 grams with 90 percent confidence? (c) Discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.