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A random sample of 10 minature Tootsie Rolls were taken from a bag. Each piece were weighed on a very accurate scale. The results in grams were.

3.087, 3.131, 3.241, 3.41, 3.70, 3.353, 3.400, 3.411, 3.437, 3.477

a) construct a 90% confidence interval for the true mean weight.
b) what sample size would be necessary to estimate the true weight with an error +/- 0.03 grams with 90% confidence?
c) discuss the factors which might cause variation in the weight of Tootsie Rolls during manufacture.

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M9435362

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