r help correlation

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..

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

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 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 negative and ..

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..

A teacher decides to examine the hypothesis between the test scores and the overall grade point average for each student for the whole year. Find t test value and test the significance of the correlation coefficient using the P-value method. r = 0.43, ∝ = 0.02, n = 5. => 0...

An educational researcher wants to find the relationship between studying hours ( x 1 ), playing hours ( x 2 ) and test scores ( y ) of the students of grade 5. Determine (i) the multiple correlation coefficient, (ii) the coefficient of multiple determination and (iii) the residual variat..

The age ( x 1 ), height ( x 2 ) and weight ( y ) of 5 children selected randomly are shown. Find the value of the multiple correlation coefficient R. Age (in years) ( x 1 ) 8 9 10 11 12 Height (in inches) ( x 2 ) 44 43 47 49 48 Weight (in lbs) ( y ) 64 60 71 76 76 => 0.99 or 0.9..