The (statistical) Truth About Cock Size

Take a look at this: http://math2.or g/math/stat/dis … ions/z-dist.htm . Scroll to the bottom of the page. Input the following:

mean = 5.877
standard deviation = 0.825
right bound = your size

What you are doing is finding the area under the bell curve from -infinity to your size. This gives you your percentile.

Thanks for your contibutions gentlemen this makes very interesting and based on that which I have seen over the years seems quite accurate.

Yes, you will need a z-score table from a statistics book, or a z-score calculator - there are several on the web. The number of std dev that a number is from its mean is called the z-score. In your case:

Your z-score for length is 1.967, so you would find that on the table for positive z-scores, i.e. measures that fall above the mean, since yours do. You would look at the primary axis for 1.9, then follow the row over until you reach 0.07 on the secondary axis (because the 1.967 rounds to 1.97), which provides a score of 97.56, which is your percentile. Note that this percentile is slightly higher than the one that I quoted. This is due to the rounding up from 1.967 to 1.97.

The alternate method is to use a z-score calculator from the web, but there is a bit more work involved. Once you plug your "Given z" into the window and click on the Calculate button, you will be given a probability, Q, which will require conversion to a percentile. Use this formula for measures above the mean (see NOTE at page bottom for measures below the mean):

%ile = (-(Q)+1) * 100

In your case, it will look like this:

Q = 0.024592

Convert this to a negative number:

-0.024592

Add 1:

0.975408

Multiply by 100:

97.5408th percentile

This z-score calculator also gives probability as 1 in x, as you will notice.

Good luck on tracking your progress.

NOTE: for measures below the mean you can simply take the given probability, 0.024592 (for 1.967 std dev), and multiply by 100.

%ile = 0.024592 * 100 = 2.4592 percentile

This method puts me in the 99.88 percentile. Definite ego boost

Thanks a lot everyone. Great work and fast response.

Jeez you guys, I’m taking Statistics right now; it’s my least favorite class, but I’m glad it comes in handy!

Bros,
All you guys are real characters.
Who would of thought that you could come to a PE website and discover mathematical analysis unlike any you might expect from a bunch of guys who pull their cocks all day long.
the mean, linear regression, covariance, standard deviation, percentile, Z test, etc.

Only at Thunders men…only at Thunders.
You guys make me proud to be a member here. ;)

It sort of surprised me that length is correlated with girth. Hardly seems fair.

Now if only they had used these examples in my statistics course in college :)

Think about it. One of the common denominators (I thing I read this on here) is the amount of testosterone you get in the womb & when puberty onsets has an influence on penis size. Now the higher levels of testosterone would likely increase the girth & the length.

Disclaimer, this could be completely offbase.

My girth is not correlated to my length. I have always been somewhat of a pencil dick.

4.5 is pencil dick?? I’d assume 4 to be pencil dick, 4 or less. I think 4.5 is decent, and above is best. I myself am 4.5.

Refresh, he probably meant his girth in relation to his (above average) length looks small.

Dang, Supe, you’re making me blush ;)

Sorry MXL, but your length and girth are still within two* standard deviations of each other, which does not qualify you to be a pencil dick. :)

*1.530 s.d. spread and 1.595 s.d. spread on your initial and most recent measurements, respectively.