Question: . In Example 6 . 2 , the ambulance supervisor now has decided to double the response time sample size to 8 calls per day.

. In Example 6.2, the ambulance supervisor now has decided to double the response
time sample size to 8 calls per day. Calculate the new UCL and LCL for a revised
X -chart. For the next week, you record the following sample of daily mean response
times: 5.2,6.4,6.2,5.8,5.7,6.3, and 5.6. Would you be concerned?

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