Question: The following is a control chart for the average number of minor errors in 22 service reports. a. Calculate the observed mean, expected mean, standard

The following is a control chart for the average number of minor errors in 22 service reports. a. Calculate the observed mean, expected mean, standard deviation and z value for the median and up/down test. Use z = +/-2 to compare your z test scores. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.) b.Based on your calculation conclude whether the test is random or non-random.

The following is a control chart for the average number of minor errors in 22 service reports.

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