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Questions › JNU › JNU SIS 2013 › Q14
4 marks, −1Statistics › Random variables and standard distributions › Uniform distributionsEasyabout 2 min

JNU SIS 2013 Question 14: Random variables and standard distributions

The probability mass function of a discrete random variable is given as f(x)=15f(x) = \dfrac{1}{5}f(x)=51​ for x=1, 2, 3, 4, 5x = 1,\ 2,\ 3,\ 4,\ 5x=1, 2, 3, 4, 5 and zero elsewhere. The mean and variance of the distribution are

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The probability mass function of a discrete random variable is given as f(x) = 1/5 for x = 1, 2, 3, 4, 5 and zero elsewhere. The mean and variance of the distribution are (A) 3; 2 (B) 3; 11 (C) 3; 9 (D) 3; 3

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

What this question tests

This question is on Uniform distributions, part of Random variables and standard distributions in Statistics.

Equally likely outcomes over a finite set or an interval.

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Question from the JNU SIS 2013 paper. Solutions are TestStop's own. Not affiliated with or endorsed by any examination authority.