36 (number) 36 (number) 36 (thirty-six) is the natural number following 35 and preceding 37. 36 is both the square of six and a triangular number, making it a square triangular number. It is the smallest square triangular number other than one, and it is also the only triangular number other than one whose square root is also a triangular number. It is also a circular number- a square number that ends with the same integer by itself (6×6=36). It is the smallest number "n" with exactly eight solutions to the equation φ("x") = "n". Being the smallest number with exactly nine
Root-mean-square deviation square root of the average of squared errors. The effect of each error on RMSD is proportional to the size of the squared error; thus larger errors have a disproportionately large effect on RMSD. Consequently, RMSD is sensitive to outliers. The RMSD of an estimator formula_1 with respect to an estimated parameter formula_2 is defined as the square root of the mean square error: For an unbiased estimator, the RMSD is the square root of the variance, known as the standard deviation. The RMSD of predicted values formula_4 for times "t" of a regression's dependent variable formula_5 with variables observed