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Continuing to monitor its upload speed, the Technical Operations team wants to ensure that the mean target upload speed for all Internet service subscribers remains at least 14.5 Mbps (compared to a target upload speed of 15 Mbps). For this question, assume that the population standard deviation is unknown. Each day, upload speed is measured 50 times, with the results for today recorded in the tab labeled 'Q3' in the Excel file: Case Assignment #3 Data.xlsx. (a) Compute the sample statistics and determine whether there is evidence that the population mean upload speed is less than 14.5 Mbps. [3 marks] (b) Write a short memo which explains your methodology, and summarizes your conclusions, from part (a). [2 marks] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 Upload speeds, in Mbps 15.405 13.369 11.828 11.971 15.301 15.886 14.031 13.691 13.734 13.060 13.628 13.846 14.552 11.957 12.237 16.343 17.110 13.948 15.667 14.047 13.310 16.303 12.306 16.371 12.025 14.392 16.540 11.931 17.286 13.638 13.452 17.472 12.145 11.889 17.202 13.941 13.818 12.878 15.219 12.692 12.325 12.090 13.224 14.307 13.106 13.224 12.672 15.454 16.830 16.566 Continuing to monitor its upload speed, the Technical Operations team wants to ensure that the mean target upload speed for all Internet service subscribers remains at least 14.5 Mbps (compared to a target upload speed of 15 Mbps). For this question, assume that the population standard deviation is unknown. Each day, upload speed is measured 50 times, with the results for today recorded in the tab labeled 'Q3' in the Excel file: Case Assignment #3 Data.xlsx. (a) Compute the sample statistics and determine whether there is evidence that the population mean upload speed is less than 14.5 Mbps. [3 marks] (b) Write a short memo which explains your methodology, and summarizes your conclusions, from part (a). [2 marks] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 Upload speeds, in Mbps 15.405 13.369 11.828 11.971 15.301 15.886 14.031 13.691 13.734 13.060 13.628 13.846 14.552 11.957 12.237 16.343 17.110 13.948 15.667 14.047 13.310 16.303 12.306 16.371 12.025 14.392 16.540 11.931 17.286 13.638 13.452 17.472 12.145 11.889 17.202 13.941 13.818 12.878 15.219 12.692 12.325 12.090 13.224 14.307 13.106 13.224 12.672 15.454 16.830 16.566
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Related Book For
Business Statistics A First Course
ISBN: 9780321979018
7th Edition
Authors: David M. Levine, Kathryn A. Szabat, David F. Stephan
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