Answer Happy

A walk-in clinic for emergency room services maintains records of the number of patients it treats per day. The following table shows the frequency of the patient arrivals over the course of a 160-day period. Number of Patients per Day Frequency a. Calculate the approximate average number of patients per day b.Calculate the approximate variance and standard deviation of the number of patients per day 20 to under 40 40 to under 60 60 to under 80 80 to under 100 100 to under 120 10 17 26 72 35 *** a. Calculate the approximate average number of patients per day X= (Round to one decimal place as needed.) b. Calculate the approximate variance of the number of patients per day. s2 = (Round to two decimal places as needed.) Calculate the approximate standard deviation of the number of patients per day S= (Round to one decimal place as needed.)