small question, is there an equation that'll give you a graph like a bell curve?

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- Jul 18th 2007, 04:35 PMQuickbell curve
small question, is there an equation that'll give you a graph like a bell curve?

- Jul 18th 2007, 05:43 PMgalactus
Yes, there is:

The one used to calculate the standard normal table is:

$\displaystyle \frac{1}{\sqrt{2\pi}}\int_{-\infty}^{z}{e^{\frac{-x^{2}}{2}}}dx$

For instance, if you have a stats book with the table to compare for fun.

Try integrating the above with z=-1.645. You should get very close to 0.05.

Actually, it's 0.0499849.... - Jul 18th 2007, 07:05 PMThePerfectHacker
- Jul 25th 2007, 06:21 AMQuick
- Jul 25th 2007, 08:15 AMCaptainBlack