For the following frequency distribution, the variance is approximately equal to Class Interval 0-5 5-10 10-15 15-20 20-25 Frequency 4 1 10 3 2

TS EAMCET 10-Sep-2020 Shift 1 Solved Paper

Section: Mathematics

Question : 35 of 160

Marks: +1, -0

For the following frequency distribution, the variance is approximately equal to

Class Interval	0-5	5-10	10-15	15-20	20-25
Frequency	4	1	10	3	2

CI	fi	xi	fixi	xi2	fixi2
0−5	4	2.5	10	6.25	25
5−10	1	7.5	7.5	56.25	56.25
10−15	10	12.5	125	156.25	1562.25
15−20	3	17.5	52.5	306.25	918.75
20−25	2	22.5	45	506.25	1012.50
Total	20		240		3575

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