10 The Citizens Banking Company is studying the number of times the ATM located in a Loblaws Supermarket at the foot of Market Street is used per day. Following are the number of times the machine was used daily over each of the last 30 days, Determine the mean number of times the machine was used per day. (Round your answer to 2 decimal places.) ts 83 64 63 80 95 36 84 78 73 61 84 68 59 54 52 84 75 59 65 90 95 47 70 52 87 61 77 60 eBook Click here for the Excel Data File References The mean number of times the machine was used per day is A Human Resources manager at Metal Technologies studied the overtime hours of welders. A sample of 15 welders showed the following number of overtime hours worked last month. 13 6 13 7 12 12 15 10 7 9 15 13 5 12 12 Click here for the Excel Data File a. Compute the arithmetic mean. (Round your answer to 2 decimal places) ences Arithmetic mean b. Indicate whether it is a statistic or a parameter O Sample statistic O Population parameter