Many employers are concerned about employees wasting time by surfing the Internet and e-mailing friends during...

Transcribed Image Text:

Many employers are concerned about employees wasting time by surfing the Internet and e-mailing friends during work hours. The article "Who Goofs Off 2 Hours a Day? Most Workers, Survey Says summarized data from a large sample of workers.t Suppose that the CEO of a national marketing firm wants to determine the difference in mean wasted time during an 8-hour workday for employees of her company at two different locations. Each person in a random sample of 10 employees from Location A (population 1) is asked about daily wasted time at work (in minutes), and 10 employees from Location B (population 2) are asked the same question. Participants were guaranteed anonymity to obtain truthful responses. Suppose the resulting data are as follows. Location A 108 132 137 112 125 135 116 128 144 83 Location B 109 107 110 112 101 103 117 115 108 100 (a) Calculate the point estimate for the difference in the population means. (b) Determine the margin of error for the 90% confidence interval for the difference in population means. (Use a table or technology. Round your answer to three decimal places.) M = (t critical value) 7₂ (c) Find the 90% confidence interval. (Round your answers to three decimal places.) (1 Use your answer from parts (a) and (b) to calculate the confidence interval., Use your answer from parts (a) and (b) to calculate the confidence interval.) Many employers are concerned about employees wasting time by surfing the Internet and e-mailing friends during work hours. The article "Who Goofs Off 2 Hours a Day? Most Workers, Survey Says summarized data from a large sample of workers.t Suppose that the CEO of a national marketing firm wants to determine the difference in mean wasted time during an 8-hour workday for employees of her company at two different locations. Each person in a random sample of 10 employees from Location A (population 1) is asked about daily wasted time at work (in minutes), and 10 employees from Location B (population 2) are asked the same question. Participants were guaranteed anonymity to obtain truthful responses. Suppose the resulting data are as follows. Location A 108 132 137 112 125 135 116 128 144 83 Location B 109 107 110 112 101 103 117 115 108 100 (a) Calculate the point estimate for the difference in the population means. (b) Determine the margin of error for the 90% confidence interval for the difference in population means. (Use a table or technology. Round your answer to three decimal places.) M = (t critical value) 7₂ (c) Find the 90% confidence interval. (Round your answers to three decimal places.) (1 Use your answer from parts (a) and (b) to calculate the confidence interval., Use your answer from parts (a) and (b) to calculate the confidence interval.)