It consists of two expressions one on each side of an equals sign. If a 0 then the equation is linear not quadratic as there is no ax² term. X the mean E Xi the summation of the scores n the number of cases in the sample The mean should be used with variables measured at the interval-ratio level Variance and Standard Deviation The distances between the scores and the mean are technically called.
In formula.
Sample standard deviation. The mathematical formula for the mean is. X distribution of X. It consists of two expressions one on each side of an equals sign.