Given below are seven observations collected in a regression study on two variables, x (independent variable) and y (dependent variable). Use Excel's Regression Tool to answer the following questions.
x y
2 12
3 9
6 8
7 7
8 6
7 5
9 2
a. What is the estimated regression equation?
b. Perform a t test and determine whether or not x and y are related. Use α = 0.05.
c. Perform an F test and determine whether or not x and y are related. Use α = 0.05.
d. Find and interpret the coefficient of determination.