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For Worker 1, calculate the 95% C.I. for the mean time per walk- in. Think about the assumptions you made. Report the lower bound using 4 digits after the decimal point.

For Worker 1, calculate the 95% C.I. for the mean time per walk- in. Think about the assumptions you made. Report the lower bound using 4 digits after the decimal point.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section: Chapter Questions
Problem 25SGR
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Worker1 Worker2 Worker3 14.84 1 IT Help Desk Questions 2 26.57 10.08 3. 24.89 18.32 19.61 The IT Help Desk supervisor from the last homework is analyzing the data collected about the mean time it takes for each Help Desk worker to solve a walk-in problem. 4 18.8 12.95 12.82 21.87 20.21 18.52 25.28 20.57 17.35 7 18.75 14.8 15.5 The supervisor believes that most walk-in problems would take at least 5 minutes but should be solved in less than 30 minutes. On 8. 23.82 18.33 13.39 9. 27.34 25.77 19.46 average, student workers should take only 15 minutes to solve any walk-in problem or decide to refer the customer to a senior IT Help Desk employee. 10 21.06 13.57 16.08 11 24.48 16.52 18.51 12 26.9 21.12 14.37 The file ITtimes.csv contains data recorded times for three 13 27.78 17.77 19.87 different student workers. For each worker, 25 walk-ins were randomly selected from last month's working hours. Remember, most statistical methods require a random sample from the population of interest. 14 17.4 15.4 13.85 15 26.55 13.91 13.5 16 24.83 15.81 15.66 17 24.27 12.69 13.41 18 22.62 13.28 16.44 19 18.81 17.44 17 20 23.5 22.53 9.43 21 23.12 18.91 17.03 22 27.34 19.51 15.77 23 18.18 14.82 14.9 24 20.94 16.74 18.12 25 21.13 17.48 20.43 26 21.01 13.57 16.26
Transcribed Image Text:Worker1 Worker2 Worker3 14.84 1 IT Help Desk Questions 2 26.57 10.08 3. 24.89 18.32 19.61 The IT Help Desk supervisor from the last homework is analyzing the data collected about the mean time it takes for each Help Desk worker to solve a walk-in problem. 4 18.8 12.95 12.82 21.87 20.21 18.52 25.28 20.57 17.35 7 18.75 14.8 15.5 The supervisor believes that most walk-in problems would take at least 5 minutes but should be solved in less than 30 minutes. On 8. 23.82 18.33 13.39 9. 27.34 25.77 19.46 average, student workers should take only 15 minutes to solve any walk-in problem or decide to refer the customer to a senior IT Help Desk employee. 10 21.06 13.57 16.08 11 24.48 16.52 18.51 12 26.9 21.12 14.37 The file ITtimes.csv contains data recorded times for three 13 27.78 17.77 19.87 different student workers. For each worker, 25 walk-ins were randomly selected from last month's working hours. Remember, most statistical methods require a random sample from the population of interest. 14 17.4 15.4 13.85 15 26.55 13.91 13.5 16 24.83 15.81 15.66 17 24.27 12.69 13.41 18 22.62 13.28 16.44 19 18.81 17.44 17 20 23.5 22.53 9.43 21 23.12 18.91 17.03 22 27.34 19.51 15.77 23 18.18 14.82 14.9 24 20.94 16.74 18.12 25 21.13 17.48 20.43 26 21.01 13.57 16.26
For Worker 1, calculate the 95% C.I. for the mean time per walk- in. Think about the assumptions you made. Report the lower bound using 4 digits after the decimal point. Hint: R commands mean(x), sd(x), and t.test() could be useful. Type your answer.
Transcribed Image Text:For Worker 1, calculate the 95% C.I. for the mean time per walk- in. Think about the assumptions you made. Report the lower bound using 4 digits after the decimal point. Hint: R commands mean(x), sd(x), and t.test() could be useful. Type your answer.
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