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.)