Times were recorded at random intervals for the times required to process customer service calls. The times were for Bob, one of the customer service representatives, and are recorded in this table.

a. Construct an X chart and 2-point MR chart for Bob's data and comment on the control status.
b. Transform Bob's data using a Box-Cox transformation with  = 0. Construct an X chart and 2-point MR chart using the transformed data. Is the process in control? Explain any inconsistencies between these conclusions and those in part a.
c. What is your estimate of Bob's average transaction time and Bob's process standard deviation?
d. information was collected for Judy, a second customer service representative, as shown in the following table.

Covert Judy's data using a Box - Cox transformation with with  = 0, and then plot Judy's data on Bob's control chart that you constructed in part b. Is there any evidence to suggest
that Judy's performance differs from Bob's? Explain.
e. Plot Judy's transformed data on a separate control chart and assess its control status.
f. What is your estimate of Judy's average transaction time and Bob's process standard deviation?

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Customer Service Transaction Times (minutes) for Bob Transaction Tran sa ction Custome Times Custome Times 10.69 16 17 18 19 20 21 23.54 7.53 3.28 8.29 2 2.90 3.77 1.26 4 2.53 11.14 2.45 0.26 3.29 9.27 7.31 4.43 17 43 1.45 7 0.65 5.55 8.18 13.22 23 24 25 26 27 28 29 30 10 12 13 14. 4.03 1.70 7.02 1.24 Customer Service Transa ction Time s (minu te s) for Judy Tra nsa ction Times 0.62 52.31 28.02 32.77 Transaction CustomeTimes 24.91 7.25 5.34 43.50 14.86 6.16 4.88 12.16 22.98 23.01 9.67 5.44 13.01 2.12 6.10 16 20 21 3.40 13.10 11.98 10.49 6.38 4.77 31.23 5.73 30.45 5.67 23 24 25 26 27 28 29 30 12