Which one of the following would be a correct inter- pretation if you have a z-score of +2.0 on an exam? (a) It means that you missed two questions on the exam. (b) It means that you got twice as many questions cor- rect as the average student (c) It means that your grade was 2 points higher than the mean grade on this exam. (d) It means that your grade was in the upper 2% of all grades on this exam. (e). It means that you grade is 2 standard deviations above the mean for this exam.
