This page performs calculations on the normal distribution, including standard normal distribution functions and inverse functions, general normal distribution functions and inverse functions, some probabilities, upper a quantiles, and so on.    In the list in the upper right corner, select the option you want to calculate, fill in the required parameters below, and click the "Start Calculation" button. <br >    Note that when entering the standard deviation, you can also start with a lowercase letter q followed by a variance number. For example, "q4" means that the standard deviation is 2, the variance is 4, and the effect is the same as direct input 2.

<img alt="" src="http://drr.ikcest.org/static/upload/1d/1d690662-ec98-11e9-80df-00163e0618d6_m.jpg" style="width: 446px; height: 319px" >