Actually I realized that what I need is the value of X. Let me make it clearer. Suppose, I know the probability P = 0.95 since I want to use two standard deviations. I know the ranges P(-500 < x <500) that means I know y and z , I know the mean and standard deviation as well. If I want to know what will be the value of x which method should I use. I have found one calculator doing something like this but could not understand which formula to use.
`I want to calculate normal distribution probability of random variables using java. Was not sure which formula to use to code to solve a problem like this. If I know the value of mean and Standard deviation and want to find the probability of being x's value between 2 certain values y and z (P(-500
Can anyone help me please?`