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Jobs and productivity! How do retail stores rate? One way to answer this question is to examine annual profits per employee. The following data give annual profits per employee (in units of 1 thousand dollars per employee) for companies in retail sales. Assume o 3.5 thousand dollars. 3.6 6.9 3.6 8.2 7.8 5.3 8.3 6.3 -1.2 4.3 2.7 5.7 (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 u, the average annual profit per employee for retail sal (Round your answers to two decimal places.) lower limit thousand dollars upper limit thousand dollars (c) Find an 95% confidence interval for u, the average annual profit per employee for retail sales. (Round your answers to two decimal places.) lower limit thousand dollars. upper limit thousand dollars

Jobs and productivity! How do retail stores rate? One way to answer this question is to examine annual profits per employee. The following data give annual profits per employee (in units of 1 thousand dollars per employee) for companies in retail sales. Assume o 3.5 thousand dollars. 3.6 6.9 3.6 8.2 7.8 5.3 8.3 6.3 -1.2 4.3 2.7 5.7 (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 u, the average annual profit per employee for retail sal (Round your answers to two decimal places.) lower limit thousand dollars upper limit thousand dollars (c) Find an 95% confidence interval for u, the average annual profit per employee for retail sales. (Round your answers to two decimal places.) lower limit thousand dollars. upper limit thousand dollars

Mathematics For Machine Technology
Mathematics For Machine Technology
8th Edition
ISBN:9781337798310
Author:Peterson, John.
Publisher:Peterson, John.
Chapter24: Percent Practical Applications
Section: Chapter Questions
Problem 41A
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Jobs and productivity! How do retail stores rate? One way to answer this question is to examine annual profits per employee. The following data give annual profits per employee (in units of 1 thousand dollars per employee) for companies in retail sales. Assume o 3.5 thousand dollars. 3.6 6.9 3.6 8.2 7.8 5.3 8.3 6.3 -1.2 4.3 2.7 5.7 (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 u, the average annual profit per employee for retail sales (Round your answers to two decimal places.) lower limit thousand dollars upper limit thousand dollars (c) Find an 95% confidence interval for u, the average annual profit per employee for retail sales. (Round your answers to two decimal places.) lower limit thousand dollars upper limit thousand dollars
Transcribed Image Text:Jobs and productivity! How do retail stores rate? One way to answer this question is to examine annual profits per employee. The following data give annual profits per employee (in units of 1 thousand dollars per employee) for companies in retail sales. Assume o 3.5 thousand dollars. 3.6 6.9 3.6 8.2 7.8 5.3 8.3 6.3 -1.2 4.3 2.7 5.7 (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 u, the average annual profit per employee for retail sales (Round your answers to two decimal places.) lower limit thousand dollars upper limit thousand dollars (c) Find an 95% confidence interval for u, 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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