Statistics Solutions

[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 (measured in grams)

Question: A random sample of 10 miniature Tootsie Rolls was taken from a bag. Each piece was weighed on a very accurate scale. The results (measured in grams) were:

3.087 3.131 3.241 3.241 3.270 3.353 3.400 3.411 3.437 3.477

Assume the weight are normally distributed.

  1. Construct a 95% confidence interval for the true mean weight.
    (b) What sample size would be necessary to estimate the true weight within 0.03 grams of the true mean with 90% confidence?
    (c) The company claimed that each piece should weight over 3.45 grams. With 5% level of significance, do the data support the claim?
    (d) Explain if you can (or cannot) use result in part (a) to answer part (c).
    Price: $2.99
    Solution: The downloadable solution consists of 2 pages
    Deliverable: Word Document


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