Author Question: Assuming a linear relationship between X and Y, if the coefficient of correlation (r) equals -0.75, ... (Read 72 times)

stephzh · **on:** Jun 24, 2018

Assuming a linear relationship between X and Y, if the coefficient of correlation (r) equals -0.75, this means that:
a. there is very weak correlation.
b. the slope b1 is = -0.75.
c. the value of X is always greater than the value of Y.
d. None of these choices are true.

Question 2

If the standard deviation of x is 18, the covariance of x and y is 120, the coefficient r = 0.90, then the standard deviation of y is 54.87.
Indicate whether the statement is true or false