The time needed for checking in at a motel is to be investigated. Historically, the process has had a standard deviation equal to 0.176 . The means of 39 samples of n=17 are Click here for the Excel Data File 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.) a-2. Is the process in control? Yes No.