Download : 10 miniature Tootsie Rolls

Download:	http://solutionzip.com/downloads/10-miniature-tootsie-rolls-solution/
A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results in grams were
3.087 3.131 3.241 3.241 3.270 3.353 3.400 3.411 3.437 3.477
(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 +_ 0.03 grams with 90 percent confidence? (c) Discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.
Download:	http://solutionzip.com/downloads/10-miniature-tootsie-rolls-solution/