1. 10.11 Homework NCSS

2. 10.11 Homework Using formulas

4. newspaper not newspaper Above 50Younger

5. 12.18

6. 12.24 H0: stress level is independent of commuting time H1: there is a relationship between stress level and commuting time There is not enough evidence to conclude that there is a significant relationship between commuting time and stress level at the 0.01 level of significance. However, there is enough evidence to conclude that there is a significant relationship between commuting time and stress level at the 0.05 level of significance. Since the pvalue is fairly small 0.043, we could be fairly confident in concluding there is a relationship (dependence) between the commuting time of company employees and the level of stress-related problems observed on the job.

7. 13.04 For a 1 square foot increase in shelf space, estimated weekly sales increases by 7.40 dollars. Yhat (when X=8) is $204.2 Predicted weekly sales for pet food with shelf space of 8 feet is $204.20.