Question

99. Calculate GM for the data given below :C - I 20-30 30-40 40-50 50-60 60-70 70-80      f 7 23 30 22 11 7

Answer 1

C-I	f	x	log x	f log x
20-30	7	25	1.3979	9.7853
30-40	23	35	1.5440	35.512
40-50	30	45	1.6532	49.596
50-60	22	55	1.7403	38.2866
60-70	11	65	1.8129	19.9419
70-80	7	75	1.8750	13.125
				166.2468

GM = antilog \(\left(\frac{\sum f\,log\,x}{N}\right)\)

= antilog \(\left(\frac {166.24 68}{100}\right)\)

(1.6624)

GM = 45.9621