Question: You are constructing a P Chart for a process for determining the proportion of customers who complete their transactions online in less than 10 minutes.

You are constructing a P Chart for a process for determining the proportion of customers who complete their transactions online in less than 10 minutes. If it is over 10 minutes then the process is defective. Each day you sample 200 customers and you have the following number of defective items for each of the last five days.

Monday 24

Tuesday 30

Wednesday 36

Thursday 42

Friday 48

a) What is the value of (p bar)?

b) If the UCL is .243 and the lower control limit is .117 is the process in control? Explain why or why not.

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