Q86.If the variance 𝜎2 of the data xi 0 1 5 6 10 12 17 is 𝑘 then the value of 𝑘 is ______ {where . fi 3 2 3 2 6 3 3 denotes the greatest integer funciton}
What This Question Tests
This question assesses the ability to calculate the mean and variance for a given frequency distribution (grouped data) and then apply the greatest integer function to the result.
Concepts Tested
Formulas Used
Mean (x̄) = (Σfi*xi) / (Σfi)
Variance (σ²) = (Σfi*xi²) / (Σfi) - (x̄)²
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📋 Question Details
- Chapter
- Statistics
- Topic
- Variance of grouped data
- Year
- 2024
- Shift
- 30 Jan Shift 2
- Q Number
- Q86
- Type
- Numerical
- NCERT Ref
- Class 11 Mathematics Ch 15: Statistics
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