You are told the following about a set of 4 xy data points T

You are told the following about a set of 4 x-y data points:
The correlation coefficient r = 0.642
The regression equation is yˆ 3.26x 0.27
The average y-value y 12.75
Given this information what would you say is the best predicted value to assign when x = 5.8.

Solution

Given the above information wthe best predicted value to assign when x = 5.8 is:

Y hat=3.26 x hat+0.27

=3.26*5.8+0.27

=19.178