Find out standard deviation and its coefficient of the following series size: 10 20 30 40 50 60 70 frequency 6 8 16 15 33 11 12 Share with your friends Share 2 Adarsh Saini answered this DDD -6 View Full Answer Sidhant Shah answered this H - L means 70-60 = 10 so QD is 10 -6 Sidhant Shah answered this Coefficient of range H-L ? H+L means 70-60 ? 70+60= 0.769 -9 Mehak answered this Don't know -6 Koshal answered this Find out standard deviation And its coefficient of the following series 20 30 40 50 60 70 frequency 6816 1553 11:12 -3 Tanuja answered this F 6 8 16 15 33 12 12 0 Subhana answered this Sadaf 1