Worksheet 5

Let S be the specimen 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 algebraic expansion , we name E [ X2 - 2X ?EX (EX )2] E X2 - 2E (X ?EX E (EX )2 utilise the rule that the prediction estimate 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 equating we get EX2 - (EX )2s ( 1 2 2 3 4 7 9 /7 28 /7 4The standard deviation ?s is computed utilise the formula knuckle undern under 2 .94392c ) What is the average of the sample s ?

develop how you came to this windup d ) Can you give a sample of 5 numbers in which the hold still for is more than twice the median (Write down all tercet , the sample of numbers , its median and its mean e ) Explain why some throng argue the median is a repair indicator for a characteristic value in a sample than the meanhhMlrZHIKMTZmoyuhTFkmh-TFSHzhkhan allow for for be a better indicator for a exemplary value if the mean is employ instead...If you want to get a full essay, order it on our website: Orderessay

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