This is useful because, typically, it is necessary to integrate the probability density function (pdf) of a random variable to determine the probabilities of outcomes within an interval for the case of a normal distribution, this is particularly difficult.
It tells us the probability that values in a normal distribution lie below, above, or between values on the standard normal distribution. Home / probability and statistics / hypothesis test / z table Z tableĪ Z table, also referred to as a standard normal table, is a table of the values of the cumulative distribution function of a normal distribution.
