Assume Sgegede Productions, a computer software company wants to test the volume of its sales (Y) in different stores throughout NY State based on the retail price (Py) charged by the
individual store and price of substitute software program (Px). A survey of sales levels in 10
stores during a particular holiday weekend is taken and shows the following figures:

Px Py Y
194 222 360
219 199 420
212 182 475
187 235 290
249 165 530
193 201 380
226 196 454
181 219 330
233 173 495
208 211 405
Given the above information, use the computer printout to show the following
information:
a. a Scatter Diagram
b. the equation for the least squares regression line which will best fit the data
c. Does the sign of the slope coefficient make economic sense? Interpret its meaning.
d. the coefficient of correlation, coefficient of determination and Adjusted r2.
What do these coefficients tell you?