Question

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 149149​-day period. 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.	Number of Patients per Day	Frequency
	20 to under 40	1919
	40 to under 60	1717
	60 to under 80	3131
	80 to under 100	5050
	100 to under 120	3232

a. Calculate the approximate average number of patients per day.

x overbarxequals=nothing

​(Round to one decimal place as​ needed.)

b. Calculate the approximate variance of the number of patients per day.

s squareds2equals=nothing

​(Round to two decimal places as​ needed.)

Calculate the approximate standard deviation of the number of patients per day.

Answer 1

Solution:

Solution :- Here given information Cam be written as below, frequency fix; Number of Patients per day (fil Now midpoint (2;] 20+40 - 30 20-40 1919 59570 40-60 1717 so 85850 60-80 3131 70 go 219170 454500 80 -100 5050 100-120 32 32 355520 Ef= 15049 1172610 t Now ! Now Average: Average - Z ti*21 - 1172610 fixx;² a fi 15oug 1727100 4292500 1534 igoo 20905000 89 107200 .: Average: 77.9 Now Versionce - Etixxj - (Average)? f = 101373700 -177.9)? - 15049 Variance = 667.83 Noo Now, Standard deviation = V vononce 1 = x 667.83 .13.D = 25.85 Thank you.!! please like it.. Total = 101373700 "