The joint probability distribution of A (age in years) and W (weight one can lift) is given. The marginal probabilities of A are: , , , , . The expectation of the marginal distribution of A is:
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2 marksStatisticsJoint distributions, covariance and correlationJoint, marginal and conditional distributionsModerateabout 3 min
DSE 2007 Question 55: Joint distributions, covariance and correlation
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The joint probability distribution of A (age in years) and W (weight one can lift) is given. The marginal probabilities of A are: P(15)=0.06, P(25)=0.38, P(40)=0.33, P(60)=0.22, P(80)=0.01. The expectation of the marginal distribution of A is: (A) 36.7 years (B) 37.6 years (C) 35.6 years (D) 38.6 years
Joint distributions, covariance and correlation has come up 61 times in 7 exams since 2005.
What this question tests
This question is on Joint, marginal and conditional distributions, part of Joint distributions, covariance and correlation in Statistics.
How two random variables behave together and separately.
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