Question

What is the first step you should take if you need to find the correlation coefficient for this graph without using a computerized tool?

A ) Construct the estimated regression line.

B ) Calculate the residuals.

C ) Calculate the mean of the residuals.

D ) Find the difference between each y-value and the predicted value.

please answer correctly

Answer 1

There are points marked on the coordinate plane in the form of Ordered pair that is (x,y).

→First we Construct estimated regression line,then we calculate residuals, that is among number of lines which we predicted or drawn as a regression line ,which line can be best regression line.

→Residuls tells which Regression line is best among Number of lines drawn as a regression line.

So, the first step will be

Option A

Construct the estimated Regression line.