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March 11th, 2012, 07:31 PM   #1
asd
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Expected Value

How can I calculate the expected value of with ?

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March 12th, 2012, 03:38 PM   #2
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Re: Expected Value

You can't. You need to know the distribution function for Y.
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March 17th, 2012, 10:27 PM   #3
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Re: Expected Value

sorry I forgot the distribution, the distribution is

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March 18th, 2012, 02:09 PM   #4
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Re: Expected Value

Unless we are at cross purposes (I am not quite sure what the random variable is - you use y and Y[with overhead bar]), you can't get an expectation, since y has a non-zero probability of = 1.
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March 18th, 2012, 06:08 PM   #5
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Re: Expected Value

Y denote a Bernoulli random variable with . I want estimate the odds ratio . I know that is a unbiased estimator of . I want to show that is not a unbiased estimator of and for that reason I want know
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March 19th, 2012, 03:29 PM   #6
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Re: Expected Value

Ybar being an unbiased estimator is (at least my understanding) is that you took a sample of a certain size and computed the mean. If my understanding is correct, then Ybar has a non-zero probability of = 1, so the estimate you are concerned about would be infinite.
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