The standard score value gives you how far the raw score value is from the mean. The standard normal distribution table is the normal distribution having a mean value of 0 and a standard deviation of 1. In this post, equivalent terms like z-values, standardized variables, and normal scores are used. Standard scores are most commonly called z-scores. Z table or the Z-score table also called the standard normal table is a mathematical table used to find the probability that the z-score value is below, above, or between the values on the standard normal distribution.