1) (2 points) the amount customers buy is a direct result of how much time they spend in a store. a study of average shopping times in a large national houseware store gave the following information: women with a female companion, average time spent in store = 8.3 minutes women with a male companion, average time spent in store = 4.5 minutes a) (1 point) suppose you want to set up a statistical test to challenge the claim that a woman with a female friend spends an average of 8.3 minutes shopping in such a store. what would you use for the null and alternative hypotheses if you believe this average shopping time is less than 8.3 minutes? is this a lower one-sided test, an upper one - sided test or a two-sided test? b) (1 point) what would you use for the null and alternative hypotheses if you believe the average shopping time is different than 8.3 minutes? is this a lower one-sided test, an upper one - sided test or a two-sided test?