The variance of the following frequency distribution is Classes 0-10 10-20 20-30 30-40 40-50 50-60 Frequency 11 29 18 4 5 3

TS EAMCET 11-Sep-2020 Shift 1 Solved Paper

Section: Mathematics

Question : 35 of 160

Marks: +1, -0

The variance of the following frequency distribution is

Classes	0-10	10-20	20-30	30-40	40-50	50-60
Frequency	11	29	18	4	5	3

Class	Mid value (xi)	fi	fixi	fixi2
0−10	5	11	55	275
10−20	15	29	435	6525
20−30	25	18	450	11250
30−40	35	4	140	4900
40−50	45	5	225	10125
50−60	55	3	165	9075

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