Question: The time needed for checking in at a hotel is to be investigated. Historically, the process has had a standard deviation equal to . 1

The time needed for checking in at a hotel is to be investigated. Historically, the process has had a standard deviation equal to .146.
The means of 39 samples of n=22 are
a-1.Construct an x-chart for this process with three-sigma limits.(Do not round intermediate calculations. Round your answers to 2
decimal places.)
UCL
LCL
a-2. Is the process in control?
Yes
No
The time needed for checking in at a hotel is to

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