# Thread: Normal Distribution & possible Standard Deviation error

1. ## Re: Normal Distribution & possible Standard Deviation error

Originally Posted by Dason
Hey guess what you're using the empirical distribution I suggested before!
Haha - For some reason I couldn't understand exactly what you meant and once I came to the conclusion on my own I realized that was what you were telling me.

Thanks guys!

2. ## Re: Normal Distribution & possible Standard Deviation error

Originally Posted by derreckn
Instead what I have done was look at the frequency for each price of the dataset. Then I divided the frequency by the total number of observations to determine the probability of each sale price. .
Issat right?....Nice to see you finally realized this. .

3. ## Re: Normal Distribution & possible Standard Deviation error

Strange, if I sum all of the probabilities up to \$1.18 then it is exactly 84.4%. This is strange because \$1.18 is exactly 1 Stdev (\$0.58) from the mean (\$0.60) based on a normal distribution. I guess that either the stdevs are accurate to the right of the mean but incorrect to the left? Doesn't matter I guess..

4. ## Re: Normal Distribution & possible Standard Deviation error

Originally Posted by derreckn
Strange, if I sum all of the probabilities up to \$1.18 then it is exactly 84.4%. This is strange because \$1.18 is exactly 1 Stdev (\$0.58) from the mean (\$0.60) based on a normal distribution. I guess that either the stdevs are accurate to the right of the mean but incorrect to the left? Doesn't matter I guess..
I think it just means that you have a coincidence.

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