The statistical mean can also be used to interpret statistical data. Some important properties make statistical mean very useful for measuring central tendency. Since Xi - X is the distance from a given number to the average. The numbers to the left of the mean are balanced by the numbers to the right of the mean.
In review, vertical angles are angles formed by the intersection of two lines while alternate interior angles, alternate exterior angles, corresponding angles and consecutive interior angles are formed by the intersection of two lines and a transversal.
Ellipse General Equation. 1  The ratio ,is called eccentricity and is less than 1 and so there are two points on the line SX which also lie on the curve. 2  One A' will lie between between S and X and nearer S and the other X will lie on XS produced.