regression line r squared

Regression should be done only when => r is significant or none of these or regression does not depend on r so can be done disregarding r or r is not significant..

Which of the following statement(s) is/are true? I. If the correlation coefficient is significant, the equation of the regression line cannot be determined. II. The values of the dependent variable can be predicted for the values of the independent variable using the regres..

The relation between the sign of the correlation coefficient( r ) and the sign of the slope( b ) of the regression line is => when r is positive, b is also positive and when r is negative, b is also negative or when r is positive, b is neg..

Which number does the point R represent on the number line? => - 4 or - 3 or - 5 or - 6..

What will be the area of each of the squares that are formed when a square is cut along the lines shown? => double the area of the original square or one-fourth of the area of the original square or one-third of the area of the original squareh..

What is the area of the rectangle formed when a square is cut along the line? => one-third the area of the square or one-fourth the area of the square or one-half the area of the square or equal to the area of the square..

How many lines of symmetry does a square have? => 2 or 1 or 4 or 6..

Which number does the point R represent on the number line? => - 5 or - 6 or - 4 or - 3..

What is the product of P, Q, R and S from the number line? => 0.192 or 1.92 or 192 or 19.2..

Which of the following statement(s) is/are false? I. The multiple correlation coefficient is always higher than the individual correlation coefficients. II. The coefficient of multiple determination denoted by R 2 , is the amount of variation explained by the regression model. I..