Mathematics, 21.02.2020 17:22, paulesparsa6
One factor in low productivity is the amount of time wasted by workers. Wasted time includes time spent cleaning up mistakes, waiting for more material and equipment, and performing any other activity not related to production. In a project designed to examine the problem, an operations management consultant took a survey of 200 workers in companies that were classified as successful (on the basis of their latest annual profits) and another 200 workers from unsuccessful companies. The amount of time (in hours) wasted during a standard 40-hour workweek was recorded for each worker. a. Do these data provide enough evidence at the 1% significance level to infer that the amount of time wasted in unsuccessful firms exceeds that of successful ones? b. Estimate with 95% confidence how much more time is wasted in unsuccessful firms than in successful ones. Here is the data: Sucessful: x-bar1 = 5.02 S1 = 1.39 n1= 200 unsuccessful x-bar2 = 7.8 S2 = 3.09 n2= 200
Answers: 3
Mathematics, 21.06.2019 16:20, tmantooth7018
The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.
Answers: 3
Mathematics, 22.06.2019 02:30, lauren21bunch
The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?
Answers: 1
One factor in low productivity is the amount of time wasted by workers. Wasted time includes time sp...
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