JEE Main 2021 — Statistics Question with Solution
From: JEE Main 2021 (Online) 26th February Evening Shift
Question
Let X1, X2, ......., X18 be eighteen observations such
that and , where and are distinct real numbers. If the standard deviation of these observations is 1, then the value of | | is ____________.
that and , where and are distinct real numbers. If the standard deviation of these observations is 1, then the value of | | is ____________.
Enter your answer
Show full solutionCorrect answer: 4
Correct answer
4
Step-by-step explanation
Given,
.... (1)
Also,
(using equation (1))
Given,
.... (1)
Also,
(using equation (1))
Given,
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This is a previous-year question from JEE Main 2021, 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.