The regression equation Credits = 15.4 –.07 Work was estimated from a sample of 21 statistics students. Credits is the number of college credits taken and Work is the number of hours worked per week at an outside job.
(a) Interpret the slope.
(b) Is the intercept meaningful? Explain.
(c) Make a prediction of Credits when Work 5 0 and when Work 5 40. What do these predictions tell you?