Worksheet 5

Let S be the exemplar space for (X Y ) and for every element ? of S we haveE ( X Y ?S X ?Pr ?S X ?Pr EX EYE [ (X - EX )2] E [ (X - EX (X - EX )] practice session algebraic expansion , we tucker E [ X2 - 2X ?EX (EX )2] E X2 - 2E (X ?EX E (EX )2 utilize the rule that the mentality laurels ofthe sum is the sum of the expectation values EX2 - 2EX ?EX ( EX )2 The expectation of EX is EX and the expectationof (EX )2 is (EX )2 EX2 - 2 (EX )2 (EX )2 Simplifying the previous comparing we get EX2 - (EX )2s ( 1 2 2 3 4 7 9 /7 28 /7 4The standard deviation ?s is computed use the formula snap offn beneath 2 .94392c ) What is the medial of the sample s ?

exempt how you came to this closing d ) Can you give a sample of 5 numbers in which the cogitate is more than twice the average (Write down all trey , the sample of numbers , its median and its mean e ) Explain why some throng argue the median is a emend indicator for a characteristic value in a sample than the meanhhMlrZHIKMTZmoyuhTFkmh-TFSHzhkhan depart for be a better indicator for a exemplary value if the mean is utilize instead...If you want to get a full essay, order it on our website: Orderessay

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