A consulting group offers courses in financial management for executives. At the end of these courses participants
Question:
where
y` = average rating by participants of the course
x1 = percentage of course time spent in group discussion sessions
x2 = money, in dollars, per course member spent on preparing course material
x3 = money, in dollars, per course member spent on food and drinks
x4 = dummy variable taking the value 1 if a visiting guest lecturer is brought in and 0 otherwise
The numbers in parentheses under the coefficients are the estimated coefficient standard errors.
a. Interpret the estimated coefficient on x4.
b. Test, against the alternative that it is positive, the null hypothesis that the true coefficient on x4 is 0.
c. Interpret the coefficient of determination, and use it to test the null hypothesis that, taken as a group, the four independent variables do not linearly influence the dependent variable.
d. Find and interpret a 95% confidence interval for b2.
Step by Step Answer:
Statistics For Business And Economics
ISBN: 9780132745659
8th Edition
Authors: Paul Newbold, William Carlson, Betty Thorne