Question

Which of the following values is NOT a valid (or possible) correlation coefficient? A. 0.7923 B. 0.0001 C. 1.2301 D. -0.9239

In regression, the space between the regression line (line of best fit) and the actual data points is the ___________.

• A. Standard deviation.
• B. Error.
• C. Predicted value.
• D. Observed value.

In regression, what does error indicate?

• A. The difference between the predicted value and the observed value Y for a given X.
• B. The difference between the predicted value and the observed value X for a given Y.
• C. The slope of the regression line.
• D. The correlation coefficient.

Answer 1

(1) option C or 1.2301 is not a possible value of correlation coefficient because we know that the correlation coefficient vary only between -1 and +1. So, 1.2301 is not possible

(2) Residual or error is the distance or difference between the regression line and actual data point. So, correct answer is option B

(3) Already mentioned in above answer that the Residual or error is the distance or difference between the regression line and actual data point. So, we can say that the error indicate the difference between the predicted value and the observed value Y for a given X.

option A