For a discrete probability distribution the mean is given by where the sum is taken over all possible values of the random variable and is the probability. In algebra a quadratic equation from the Latin quadratus for square is any equation that can be rearranged in standard form as ax²bxc0 where x represents an unknown and a b and c represent known numbers where a 0. The result is your mean or average score.
Calculate expression inside first.
For example lets say you have four test scores. The mean the mean over here is going to be equal to one plus one plus six plus four all of that over we still have four data points. Suppose x 1 x 2 x 3 x n be n observations with respective frequencies f 1 f 2 f 3 f n. This value is taken for.