Solved UPSC CDS/OTA Question
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Q · Statistics Moderate · 45s
Find the population standard deviation of 5, 7, 9, 11.
TopicStatistics
Question Typemultiple choice
DifficultyModerate
Marking+1 / −0.33
Test Duration30 min
Step-by-Step Solution
The complete worked solution.
Every step explained — no skipped algebra.
σ=√σ²=√5.00=2.236.
Final Answer: Option B — 2.236