BITSAT SERIES
Mathematics

Variance And Standard Deviation

4 previous year questions.

Volume: 4 Ques
Yield: Medium

High-Yield Trend

1
2026
2
2013
1
2012

Chapter Questions
4 MCQs

01
PYQ 2012
medium
mathematics ID: bitsat-2
If sample A contains 100 observations 101, 102, .... 200 and sample B contains 100 observations 151, 152, .... 250, then the ratio of variance is:
1

2

3

4

02
PYQ 2013
medium
mathematics ID: bitsat-2
Find the variance of the data given below
1
1.29
2
1.32
3
1.36
4
None of these
03
PYQ 2013
medium
mathematics ID: bitsat-2
Find the variance of the data given below
Occurance Frequency Freq
3.5 3 10.5 -3.59 12.887 38.661
4.5 7 31.5 -2.59 6.707 46.952
5.5 22 121 121 2.528 55.609
6.5 60 390 -0.59 0.348 20.876
7.5 85 637.5 0.41 0.168 14.298
8.5 32 272 1.41 1.988 63.632
9.5 8 76 2.41 5.809 46.47
Total 217 1538.5 - - 286.498
1
1.29
2
2.19
3
1.32
4
None of these
04
PYQ 2026
medium
mathematics ID: bitsat-2
The variance of 20 observations is 5. If each observation is multiplied by 2, then the new variance of the resulting observation is
1

2

3

4

About Variance And Standard Deviation - BITSAT

Variance And Standard Deviation is a vital chapter for BITSAT aspirants. Mastering the concepts covered in this chapter is essential for securing a top rank.

By rigorously practicing the previous year questions associated with this chapter, you can identify high-yield topics, understand the examiner's perspective, and boost your confidence during the actual exam.

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