formula for correlation r

Which of the following statement(s) is/are true? I. The multiple correlation coefficient denoted by R takes into account all the independent variables and can be computed by using the values of the individual correlation coefficients. II. R can range from - 1..

Which of the following statement(s) is/are true for correlation? I. If the change in one variable affects a change in the other variable, the variables are said to be correlated. II. Correlation coefficient is independent of change of origin and scale. III. If r..

What is the upper bound the correlation coefficient r ? => 1 or 2 or 0 or -1..

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 regressio..

Positive correlation means ______. => points can be approximated by a line with a negative slope or points can be approximated by a line with a positive slope or points that cannot be approximated by a line or points can be approximated by a curve..

The formula for the F test used to test the significance of the multiple correlation coefficient R using n the number of data sets and k the number of independent variables and d.f. N = n - k , d.f. D = n - k - 1 is => R 2 ( n - k ) 1 - R 2 ( n - k ..

The correlation coefficient for the age and blood pressure of 4 people taken randomly is given. Find t and test the significance of correlation coefficient r = 0.9478, use ∝ = 0.01 and n = 4. => 4.2, significant relationship or 1.2, no significant relationship or ..

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 regression line equat..

Given r yx 1 = 0.618, r yx 2 = 0.782 and r x 1 x 2 = 0.764. Find the value of the multiple correlation coefficient R. => 0.618 or 0.783 or 0.738 or 0.612..

The manager of a basketball team wanted to know whether there is any relationship between the age ( x 1 ) of the players, their heights ( x 2 ) and the average points per game ( y ) scored by them in the previous season before selectinfg the team for the next season. Find F test value and test the ..