The data in the Problem 5 worksheet of the “Data” file gives the average weight

Question

The data in the Problem 5 worksheet of the “Data” file gives the average weight for a run of a particular product.   The desired weight is 80.

      a. Prove if this run is different from the desired weight (95% confidence level).

      b. Assume you wish to design the test so that if the true weight differs from 80 by as much as 1, the test will detect this with a high probability (0.90). What is the minimum recommended sample size?

79.57041 80.2044 78.41281 78.46854 78.29528 81.50792 80.91934 76.83511 78.75906 78.25698 77.1058 80.42765 77.68243 76.05176 78.10652 76.46667 79.16165 81.96611 77.0451 78.14036 80.12461 77.03858 77.81332 78.95257 77.79313 80.45822 79.12508 79.18585 75.74377 75.87385 77.17307 80.08272 76.53555 75.52677 79.3229 78.71004 74.8263 82.28452 79.66229 80.97009 76.79542 79.95095 80.69795 77.75285 77.06659 78.50403 79.06679 80.53678 78.30829 79.59353

Explanation / Answer

The data in the Problem 5 worksheet of the “Data” file gives the average weight

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