Discuss the factors which might cause variation

Reference no: EM1319824

Question: A random sample of ten 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, 3.270, 3.353, 3.400, 3.411, 3.437, and 3.477

[A] What sample size would be necessary to estimate the true weight with an error of 0.03 grams with 90 percent confidence?
[B] Discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.
[C] Construct a 90% confidence interval for the true mean weight.

Reference no: EM1319824

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