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April 25, 2026, 02:37:09 am
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Author Topic: The integration of the expectated value and E(X^2) of a normal distribution  (Read 988 times)  Share 

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grundog49

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The integration of the expectated value and E(X^2) of a normal distribution
« on: August 22, 2017, 10:47:18 am »
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Hi, I can't seem to be able to integrate the expected value of a normal distribution (not the standard one but one in the general form) on my calculator. I've updated it and have optimised it as much as possible and still gives me an error (ERROR: Insufficient Memory) despite this. I have a Casio Classpad II fx-CP400
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keltingmeith

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Re: The integration of the expectated value and E(X^2) of a normal distribution
« Reply #1 on: August 22, 2017, 11:39:32 am »
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Quote from: grundog49 on August 22, 2017, 10:47:18 am
Hi, I can't seem to be able to integrate the expected value of a normal distribution (not the standard one but one in the general form) on my calculator. I've updated it and have optimised it as much as possible and still gives me an error (ERROR: Insufficient Memory) despite this. I have a Casio Classpad II fx-CP400

Yeah, there's lots of reasons for this. If you're trying to find the second moment (E[X^2]), though, you can do it by some careful algebraic manipulation. Remember the formula:



You should know the variance and mean from the parameters of the normal distribution.
« Last Edit: August 22, 2017, 05:02:14 pm by keltingmeith »
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Willba99

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Re: The integration of the expectated value and E(X^2) of a normal distribution
« Reply #2 on: September 03, 2017, 05:12:07 pm »
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Yeah my class has the same problem. Lets just hope theres not quetion about it on Exam 2!
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