Plot normal cdf

[Christian Young]

Hi all, can anybody help me with the command to plot a cdf for a normal distribution?
Thanks

[Maarten Buis]

twoway function y = normal(x), range(-4 4)

[Christian Young]

Fantastic! One more question, what about a cdf for a normal distribution with a specific mean and variance?

[Maarten Buis]

here is an example with a mean of +3 and a variance of .5, so a standard deviation of \( \sqrt{.5} \) :

twoway function y = normal((x-3)*sqrt(.5)), range(-4 4)

[Christian Young]

Thanks Maarten, I am a little confused as to when when I use your code with mean=24, and SD=8, the cdf is very steep about the mean, which is odd given the SD, and given the same cdf in Wolfram Alpha looks a lot more accurate, are you able to help/explain this? I have searched a lot online with no avail...Thanks!

[Maarten Buis]

If you do not tell us exactly what you typed, then we cannot tell you what your mistake is.

[Maarten Buis]

The mistake was mine, you need to divide by the standard deviation, not multiply.

twoway function y = normal((x-24)/8), range(0 48)