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Questions › JNU › JNU SSS 2020 › Q19
1 markStatistics › Random variables and standard distributions › The normal distributionEasyabout 1 min

JNU SSS 2020 Question 19: Random variables and standard distributions

If X∼N(30,52)X \sim N(30, 5^2)X∼N(30,52) then which one of the following is correct ?

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If X ~ N(30, 5²) then which one of the following is correct? (A) P(X ≥ 30)=0.5 (B) P(X ≤ 0)=P(X ≥ 0) (C) P(|X| ≤ 1)=P(|X| ≥ 1) (D) P(30 ≤ X ≤ 40)=P(20 ≤ X ≤ 30)

Also written as: If X ~ N(30, 5^2) then which one of the following is correct?

Random variables and standard distributions has come up 173 times in 7 exams since 2005.

What this question tests

This question is on The normal distribution, part of Random variables and standard distributions in Statistics.

The bell curve: standardising, tail probabilities and approximations.

TestStop has 20 past-paper questions on this subtopic; the nearest in year are below.

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Practise Random variables and standard distributionsMore on The normal distribution

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Question from the JNU SSS 2020 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.