Barb scored a 78 on her English exam. Her class has a mean score of =80 with a standard deviation of 2. Her friend Sally scored a 80 in a different English class. Sally's class had a mean score of =82 with a standard deviation of 1. Calculate a z-score for each person. Who scored higher relative to her class? a.Barb scored higher than Sally relative to her class. b.Sally scored higher than Barb relative to her class. c.Barb and Sally score the same relative to their classes. d.It's not possible to tell based on the given information