Linear Regression Calculation

Model : CASIO  fx-991MS, CASIO fx-570MS, CASIO  fx-100MS

Regression is an important part in statistical calculation. Here we develop relationship between two variables on the basis of observed data assuming the relationship to be linear, parabolic,quadratic etc.


Example: On the basis of following data establish regression equation between x and y assuming the relation to be linear.( Let y=A+Bx and Find out A,B,correlation coefficient r). Also calculate  Σx, Σx², Σy, Σy², Σxy, x̅, xσ_n, xσ_n-1,(standard variation), x̅, y bar, yσ_n, yσ_{n-1, estimated value of y for x=18,} estimated value of  x for y=20. (Answers: Σx=100, Σx²=2250, Σy=5043, Σy²=5086451, Σxy=101000, x̅=20, xσ_n=7.071,