Q76.The mean of 5 observations is 5 and their variance is 12. 4. If three of the observations are 1, 2 & 6; then the value of the remaining two is : (1) 1, 11 (2) 5, 5 (3) 5, 11 (4) None of these
What This Question Tests
This question tests the application of formulas for mean and variance to determine unknown observations from a given set of data.
Concepts Tested
Formulas Used
Mean = (Σxᵢ)/n
Variance (σ²) = (Σxᵢ²)/n - (Mean)²
📚 NCERT Sections This Tests
6.11 — Dynamics Of Rotational
Physics Class 11 · Chapter 6
6.11 Dynamics of rotational the motion of extended bodies. motion about a fixed axis A large class of problems with extended bodies can be
4.13 — How Is The Variability In Oxidation States Of Transition Metals Different From
Chemistry Class 11 · Chapter 4
4.13 How is the variability in oxidation states of transition metals different from that of the non transition metals? Illustrate with examples.
1.3 — Define The Following Terms:
Chemistry Class 11 · Chapter 1
1.3 Define the following terms: (i) Mole fraction (ii) Molality (iii) Molarity (iv) Mass percentage.
📋 Question Details
- Chapter
- Statistics
- Topic
- Mean and Variance
- Year
- 2016
- Shift
- 10 Apr Online
- Q Number
- Q76
- Type
- MCQ
- NCERT Ref
- Class 11 Mathematics Ch 15: Statistics
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