Sebaran normal: Béda antarrépisi

the density function is symmetric about its mean value. About 68% of the area under the curve is within one standard deviation of the mean, 95.5% within two standard deviations, and 99.7% within three standard deviations. The [[inflection point|inflection points]] of the curve occur at one standard deviation away from the mean.

 

 

 

:<math>\Pr(X \le x) = \int_{-\infty}^x \frac{1}{\sigma\sqrt{2\pi}} e^{-(u-\mu)^2/(2\sigma^2)}\,du</math>