1.A company is interested in monitoring the average time it takes to serve its customers. The results for fivesamples are given in the table.SampleService time (in minutes)112.19.410.37.5210.28.413.68.339.211.012.710.1410.06.37.88.156.67.98.79.3a. Determine the central line and control limits for the range and mean charts, and discuss whether or notthe process is in statistical control. b. The sample data for a subsequent day had the values: 7.1, 11.5, 9.6, and 14.4. What conclusion can bereached about the state of the process?

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Answered: 1. A company is interested in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The increasing annual cost (including tuition, room, board, books, and fees) to attend college has been widely discussed.† The following random samples show the annual cost of attending private and public colleges. Data are in thousands of dollars. Private Colleges Public Colleges 53.8 43.2 46.0 32.3 44.0 20.3 22.0 28.2 15.6 24.1 28.5 30.6 44.8 36.8 50.5 43.0 22.8 25.8 18.5 25.6 14.4 21.8 (a) Compute the sample mean (in thousand dollars) and sample standard deviation (in thousand dollars) for private colleges. (Round the standard deviation to two decimal places.) sample mean $ thousand sample standard deviation 2$ thousand Compute the sample mean (in thousand dollars) and sample standard deviation (in thousand dollars) for public colleges. (Round the standard deviation to two decimal places.) sample mean %24 thousand sample standard deviation %$4 thousand
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