D 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 150-day period. O 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. O O 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 I patients per day. s²= (Round to two decimal places as needed.) Calculate the approximate standard deviation of the number patients per day. S= (Round to one decimal place as needed.) SCIEN 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 Frequency 13 21 23 58 35

Consider the following data x -4,-3,-2,-1,0 P(X=x) 0.3,0.1,0.2,0.1,0.3 Find the variance. Round your answer to one decimal place.

Please answer a and b

The following set of data represents the number of orders filled by a national-chain restaurant during a two week period. Construct a five number summary for the the data.   66, 75, 68, 89, 86, 73, 67, 75, 75, 82, 85, 74, 67, 61 (Round to the nearest hundredth, if needed).    Min _________________ Lower Quartile _________________ Median __________________ Upper Quartile _________________ Maximum __________________   What is the range and the interquartile range (IQR)?  Range __________________ Interquartile Range (IQR)  ___________________