Mean The time needed for checking in at a motel is to be investigated. Historically, the process has had a standard deviation equal to 0.161 The means of 39 samples of n =18 are Sample Mean Sample Mean Sample Sample Mean 3.86 11 3.88 21 3.84 31 3.88 2 3.90 12 3.86 22 3.82 32 3.76 3.83 13 3.88 23 3.89 33 3.83 3.81 14 3.81 24 3.86 34 3.77 3.84 15 3.83 25 3.88 35 3.86 3.83 16 3.86 26 3.90 36 3.80 3.87 17 3.82 27 3.81 37 8 3.88 3.84 15 3.86 28 3.36 38 9 3.79 3.34 19 3.84 29 3.98 3.80 20 3.85 3.07 30 3.96 5 5 7 10 Click here for the Excel Dato File a 1 Construct an-chart for this process with three sigma limits. (Do not round intermediate calculations. Round your answers to 2 decimal places.) UCL LCL 0-2. Is the process in control? Yes b. Analyze the data using a median run test and an up/down run test. What can you conclude? Conclusion Test Median Up/Down D