Lil' HW help please. Here is the question as it is written. "Compute and show the range of scores for each test that fall within one standard deviation from the mean. Last, using z-scores, which student did best on all four examinations collectively? Bear in mind that this is not asking for the highest scoring student on each exam; that is self-evident. Which student performed poorest on all four exams collectively?"

Students 1-8 exams a-d----a b c d1 64 64 69 472 79 69 34 583 74 64 49 494 69 69 56 495 64 54 44 546 79 49 54 427 74 44 49 628 79 61 74 56Now, I've done the 1st part of the problem and found the standard deviation of the each exam: a=6, b=8.7, c=12.1, d=6.

I know how to figure a z-score, but I know how to answer his question. Wouldn't be the student how averaged the best? what do z-scores have to do with it?