The probability density function (PDF) of a normal random variable $X \sim N(\mu, \sigma^2)$ is:
$$f(x) = \frac{1}{\sigma \sqrt{2\pi}} \exp\left( -\frac{(x - \mu)^2}{2\sigma^2} \right), \quad -\infty \lt x \lt \infty$$The bell-shaped curve achieves its peak (maximum ordinate) at the mean $x = \mu$. At $x = \mu$:
$$f(\mu) = \frac{1}{\sigma \sqrt{2\pi}} e^0 = \frac{1}{\sigma \sqrt{2\pi}}$$प्रसामान्य बंटन $X \sim N(\mu, \sigma^2)$ का प्रायिकता घनत्व फलन (PDF):
$$f(x) = \frac{1}{\sigma \sqrt{2\pi}} e^{-\frac{(x-\mu)^2}{2\sigma^2}}$$प्रसामान्य वक्र का शीर्ष (अधिकतम कोटि) माध्य $x = \mu$ पर स्थित होता है$x = \mu$ रखने पर:
$$f(\mu) = \frac{1}{\sigma \sqrt{2\pi}} e^0 = \frac{1}{\sigma \sqrt{2\pi}}$$