If we take a sample of `` n '' observations from a normal distribution , then the `` t '' - distribution with formula_14 degrees of freedom can be defined as the distribution of the location of the true mean , relative to the sample mean and divided by the sample standard deviation , after multiplying by the normalizing term formula_15 .
If we take a sample of `` n '' observations from a normal distribution , then the `` t '' - distribution with '' ν = n − 1 '' degrees of freedom can be defined as the distribution of the location of the true mean , relative to the sample mean and divided by the sample standard deviation , after multiplying by the normalizing term formula_6 .