Question: f3: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

f3: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.)

Test	observed	expected	std. Dev	Z
Median
Up/Down

b.Based on your calculation conclude whether the test is random or non-random.

Test	Conclusion
Median
Up/Down

Please show how you got each answer.

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