Same chapter3 marksDifficulty: Medium
Find the standard deviation of the first five natural numbers.
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3 marksDifficulty: Medium
Find the variance and the standard deviation of 2, 4, 6, 8 and 10.
Original Khojo Papers practice question — not from a past board paper.
Answer
Variance 8 and standard deviation 2√2 ≈ 2.83
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The mean is 6, and the squared deviations are 16, 4, 0, 4 and 16, whose mean is 40/5 = 8. The standard deviation is √8 = 2√2.
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