You run a publishing company and you are assessing your proofreaders. You hope that they can proofread an average of 1000 words per hour, an industry benchmark, If they average fewer than 1000 words per hour you will need to reconfigure the staffing. You test the proofreading times of a sample of 100 of the proofreaders and find the sample average words per hour is 975 and the sample standard deviation is s 600. Test whether the population mean words per hour is greater than 1000 with a 95% confidence level. The z-critical value for this test is za Z0.05 = 1.645. Show all your steps clearly and illustrate your answer with a graph.

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Author:Amos Gilat
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You run a publishing company and you are assessing your proofreaders. You hope that they can proofread an
average of 1000 words per hour, an industry benchmark, If they average fewer than 1000 words per hour you
will need to reconfigure the staffing. You test the proofreading times of a sample of 100 of the proofreaders
and find the sample average words per hour is =
whether the population mean words per hour is greater than 1000 with a 95% confidence level. The z-critical
value for this test is Z = Zo.05
975 and the sample standard deviation is s = 600. Test
1.645. Show all your steps clearly and illustrate your answer with a graph.
%3D
Transcribed Image Text:You run a publishing company and you are assessing your proofreaders. You hope that they can proofread an average of 1000 words per hour, an industry benchmark, If they average fewer than 1000 words per hour you will need to reconfigure the staffing. You test the proofreading times of a sample of 100 of the proofreaders and find the sample average words per hour is = whether the population mean words per hour is greater than 1000 with a 95% confidence level. The z-critical value for this test is Z = Zo.05 975 and the sample standard deviation is s = 600. Test 1.645. Show all your steps clearly and illustrate your answer with a graph. %3D
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