Which of the following is NOT true? When all the points fall on the regression l

ID: 3296430 • Letter: W

Question

Which of the following is NOT true?

When all the points fall on the regression line, the value of the correlation coefficient (r) would equal zero.

Before a regression analysis is performed, one should draw a scatter plot and test the significance of the correlation coefficient (r).

In the equation of the regression line, the symbol a is used for the y intercept.

In the equation of the regression line, the symbol b is used for the slope.

When all the points fall on the regression line, the value of the correlation coefficient (r) would equal zero.

Before a regression analysis is performed, one should draw a scatter plot and test the significance of the correlation coefficient (r).

In the equation of the regression line, the symbol a is used for the y intercept.

In the equation of the regression line, the symbol b is used for the slope.

a. NOT true: Correlation r is a measure to represent the linear dependence of two variables

b. true: Before a regression analysis performed, it is a must that we should check whether x and y are linearly related or not.

c. true. a is used for y intercept

d. true. b is used for slope

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.