![]() ![]() This means that the standard normal distribution can be used to calculate the exact percentage of scores between any two points on the normal curve. Every score in a normally distributed data set has an equivalent score in the standard normal distribution.The standard normal distribution (graph below) is a mathematical-or theoretical distribution that is frequently used by researchers to assess whether the distributions of the variables they are studying approximately follow a normal curve. ![]() Each data set or distribution of scores will have their own mean, standard deviation and shape - even when they follow a normal distribution.Ī normal distribution with a mean of 0 (u=0) and a standard deviation of 1 (o= 1) is known a standard normal distribution or a Z-distribution. Normal distributions do not necessarily have the same means and standard deviations.
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