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A critical dimension of the service quality of a call center is the wait time of a caller to get to a sales representative. Periodically, random samples of three customer calls are measured for time. The results of the last four samples are in the following table: Time (sec) Sample 1 2 3 1 501 490 488 2 509 498 487 3 503 492 496 4 497 507 487 Click the icon to view the table of factors for calculating three-sigma limits for the x- -chart and R-chart. Factors for calculating three-sigma limits for the x-- chart and R-chart Size of Sample(n) Factor for UCL and LCL for x—chart (A2) Factor for LCL forR-Chart (D3) Factor for UCL forR-Chart (D4) 2 1.888 0 3.267 3 1.023 0 2.575 4 0.729 0 2.282 5 0.577 0 2.115 6 0.483 0 2.004 7 0.419 0.076 1.924 8 0.373 0.136 1.864 9 0.337 0.184 1.816 10 0.308 0.223 1.777 a. Assuming that management is willing to use three-sigma control limits, and using only the historical information contained in the four samples, show that the call center access time is in statistical control. Since all the sample ranges are between UCLr =( )seconds and LCLr =( )seconds and all of the sample means are between UCL –x = ( ) seconds and LCL x- = ( ) seconds, the call center access time is in statistical control. (Enter your responses rounded to two decimal places.)
The following announcement was sent to all 1,200 students at Jefferson high school. Identify the questions readers might have after getting this announcement. Revise the announcement for a more effective message and add any details you wish. Be prepa..
describe and explain the us economy business cycle. what are the key economic indicators of the us economy? why are they important to consider.
Introducing New Management Information Systems
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New software has been purchased to reduce time in calculating customers accounts. Establishing raport and effective communication with team members is primary importance to make this situation successful
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As the company's Operating Manager prepare a report for discussion at the management discussing calculating the cost of the special order and if the considering the following items.
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