3.7 6.9 3.8 8.5 8.4 5.2 8.6 6.1 -1.2 4.6 2.3 5.8 (a) Find x for the preceding data. (Round your answer to two decimal places.) thousand dollars per employee (b) Let us say that the preceding data are representative of the entire sector of retail sales companies. Find an 80% confidence interval for μ, the average annual profit per employee for retail sales. (Round your answers to two decimal places.) lower limit thousand dollars upper limit thousand dollars

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