The variance of the following frequency distribution is Class Interval 0-6 6-12 12-18 18-24 24-30 Frequency 10 8 6 4 2

TS EAMCET 9-Sep-2020 Shift 2 Solved Paper

Section: Mathematics

Question : 36 of 160

Marks: +1, -0

The variance of the following frequency distribution is

Class Interval	0-6	6-12	12-18	18-24	24-30
Frequency	10	8	6	4	2

CI	fi	xi	fixi	xi2	fixi2
0−6	10	3	30	9	90
6−12	8	9	72	81	648
12−18	6	15	90	225	1350
18−24	4	21	84	441	1764
24−30	2	27	54	729	1458
Total	∑fi=30		∑fixi=330		∑fixi2=5310

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