Help on Expected Frequencies Q2 & 3 - No Quotes

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Homework Help Overview

The discussion revolves around questions related to expected frequencies in the context of probability distributions, specifically focusing on Poisson and normal distributions.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants are attempting to understand the expectations and variances for Poisson and normal distributions. Questions are raised regarding the calculation of variance and the identification of possible values and probabilities associated with the Poisson distribution.

Discussion Status

The discussion is ongoing, with participants sharing their thoughts on expectations and variances. Some guidance has been offered regarding the integration of the probability density function (PDF) for the normal distribution, but no consensus has been reached on the specific calculations or interpretations.

Contextual Notes

Participants are navigating the complexities of probability distributions without providing complete solutions, and there is a reference to external resources for further exploration.

ongfufu
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I need help on question 2 and 3. For question 2, I think I got the expectation for Poisson distribution, but I have no idea how to get the normal one. Could someone provide me a formula or something? Thanks a lot!
 
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ongfufu said:
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I need help on question 2 and 3. For question 2, I think I got the expectation for Poisson distribution, but I have no idea how to get the normal one. Could someone provide me a formula or something? Thanks a lot!

Once you have the PDF (Probability distiribution (normal in your case)), you integrate the PDF between the range of each bin and multiply it by 1000. You probably have tables for this in your text. One way you could get the PDF is from the mean and variance.
 
I think the expectation for Poisson is the mean for this. So how would I get the variance? I know its the sum of the square of the possible values multiplied by the probabilities, subtract the mean squared. But what are the possible values and the probabilities?
 
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