1. In each of the following, would you use a one tailed or two tailed test? Why?
   1. I predict that Downey brand dryer sheets will make my clothes a lot softer than Target brand dryer sheets.

1. Venus and Serena will not play the same number of tournaments in tennis this year.

1. Driving performance in the older population will be significantly worse than the younger population.

1. There is a significant difference in happiness between college-age students and non-college people of the same age.