MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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Twenty-nine fast-food restaurant hourly employees were surveyed to see how many hours they worked per week, on average. The following data was obtained: 23, 18, 30, 17, 29, 38, 32, 27, 35, 28, 26, 32, 21, 34, 42, 31, 26, 21, 32, 32, 36, 32, 23, 39, 43, 24, 18, 32, 25 Assuming the population standard deviation is o = 8, construct a 86% confidence interval for the mean number of hours per week that the population of fast-food restaurant employees work. I = 24 Margin of Error: E We are 86% confident that fast-food restaurant hourly employees, on average, work between hours and hours per week.
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Transcribed Image Text:Twenty-nine fast-food restaurant hourly employees were surveyed to see how many hours they worked per week, on average. The following data was obtained: 23, 18, 30, 17, 29, 38, 32, 27, 35, 28, 26, 32, 21, 34, 42, 31, 26, 21, 32, 32, 36, 32, 23, 39, 43, 24, 18, 32, 25 Assuming the population standard deviation is o = 8, construct a 86% confidence interval for the mean number of hours per week that the population of fast-food restaurant employees work. I = 24 Margin of Error: E We are 86% confident that fast-food restaurant hourly employees, on average, work between hours and hours per week.
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Step 1: Confidence level = 94% = 0.94 a = (1 confidence level) a = (1 - 0.94) = 0.06 a / 2 = (0.06/2) a / 2
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Step 2: We have, overline x = 34.21 and E = 3.49 Hence the 94% confidence interval is, = (34.21 plus/minus 3
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