descriptions on the packages as the only buying guide. The length of time necessary to reach a decision is recorded for 15 participants in the study. Length of decision time (seconds) 7 7 10 10 11 10 12 a. Is a simple regression line appropriate for these data? Why or why not? b. Is the line a useful predictor? (Use or = 0.05) Why or why not? (Use Excel to find the equation of the line. MGMT 7 students: in your exam the model will be provided) c. A new customer just walked into the display setup with two alternatives. What are 95% limits on the decision time? d. What percentage of the variability in decision time can be attributed to changing the number of alternatives? e. On the basis of these calculations, can we conclude that increasing the number of alternatives causes the decision time to increase