B9. Which of the following statements about least-squares regression involving two quantitative variables, ? and ?, is FALSE? A change of 1 standard deviation in x corresponds to a change of ?...

B9. Which of the following statements about least-squares regression involving two quantitative variables, ? and ?, is FALSE?

1. A change of 1 standard deviation in x corresponds to a change of ? standard deviations in ?.


2. The least-squares regression line always passes through the point ().


3. The least-squares regression line of ? on ? is the line that makes the sum of the squares of the vertical distances of the data points from the line as small as possible.


4. When the least-squares regression line is a perfect fit to the data, the correlation coefficient will be exactly 0.