what is a cdf for standard normal what is the value of phi(x)$ for a constant what is the standard deviation of a normal distribution what is the function of phi(x)$ in a standard normal distribution what is the cdf for standard random variable what is the cdf for the standard normal distribution what is the standard normal distribution what is the cdf for a standard normal distribution what does phi(x) mean what is phi(ax)$ what is the standard normal distribution? what is the cdf for standard random variable? is Phi a standard normal distribution how to write a cdf of normal distribution what is phi(x)$ what is the cdf of the standard normal distribution what is the standard deviation of phi what is the cdf for standard normal distribution what is the transform of standard normal distribution transform standard normal distribution - phi