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[Solution Library] Job and Productivity. How do retail stores rate? The following data give annual profit per employee. Assume o = 3.8 thousand dollars

Question: Job and Productivity. How do retail stores rate? The following data give annual profit per employee. Assume o = 3.8 thousand dollars

4.4 6.5 4.2 8.9 8.7 8.1 6.1 6.0 2.6 2.9 8.1 -1.9
11.9 8.2 6.4 4.7 5.5 4.8 3.0 4.3 -6.0 1.5 2.9 4.8
-1.7 9.4 5.5 5.8 4.7 6.2 15.0 4.1 3.7 5.1 4.2
  1. Use a calculator or appropriate computer software to verify that , for the preceding data, xbar = 5.1
  2. Let’s say that the preceding are representative of the entire sector of (successful) financial services corp. Find a 75% confidence interval for u, the average annual profit per employee for all successful banks.

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