JEE Main 2003 — Statistics Question with Solution
From: AIEEE 2003
Question
In an experiment with 15 observations on , then following results were available:
,
One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is :
,
One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is :
Choose an option
Show full solutionCorrect option: D
Correct answer
D78.00
Step-by-step explanation
Given that,
N = 15,
As, 20 was replaced by 30 then,
and
So, the corrected variance
N = 15,
As, 20 was replaced by 30 then,
and
So, the corrected variance
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This is a previous-year question from JEE Main 2003, covering the Statistics chapter of Mathematics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.