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QUESTION
Why is this answer not correct?
Why is this answer not correct? 1.32 is wrong and everything else is correct...
Problem 10-28
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. (Negative amounts should be indicated by a minus sign. Round your answers to 2 decimal places.)
