A sample of size is drawn without replacement from an urn with balls numbered . Let be the smaller and the larger of the two drawn. The covariance between and is
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2 marks, −0.666666666666667StatisticsJoint distributions, covariance and correlationCovariance and its propertiesModerateabout 3 min
DSE 2015 Question 51: Joint distributions, covariance and correlation
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A sample of size 2 is drawn without replacement from an urn with balls numbered 1,2,3. Let X be the smaller and Y the larger of the two drawn. The covariance between X and Y is (A) 1/9 (B) 3/11 (C) 11/3 (D) 3/4
Joint distributions, covariance and correlation has come up 61 times in 7 exams since 2005.
What this question tests
This question is on Covariance and its properties, part of Joint distributions, covariance and correlation in Statistics.
How two variables move together and how covariance combines.
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