Question: Problem 10-28 The following is a control chart for the average number of minor errors in 22 service reports. %media.figure28_4.jpg% a. Calculate the observed mean,

Problem 10-28 The following is a control chart for the average

Problem 10-28 The following is a control chart for the average number of minor errors in 22 service reports. %media.figure28_4.jpg% a. Calculate the observed mean, expected mean, standard deviation and z value for the median and up/down test. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.) Observed Expected Test Median Up/Down b.Based on your calculation conclude whether the test is random or non-random Test Median Up/Down Conclusion (Click to selec Click to selec 7 Problem 10-28 The following is a control chart for the average number of minor errors in 22 service reports. %media.figure28_4.jpg% a. Calculate the observed mean, expected mean, standard deviation and z value for the median and up/down test. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.) Observed Expected Test Median Up/Down b.Based on your calculation conclude whether the test is random or non-random Test Median Up/Down Conclusion (Click to selec Click to selec 7

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