An examination of grades from last year’s statistics tests shows that the distribution is Normal. If Claire’s mark has a z-score of 1.23, which one answer corresponds? A. Claire scored 1.23% below the...

An examination of grades from last year’s statistics tests shows that the distribution is Normal. If Claire’s mark has a z-score of 1.23, which one answer corresponds?

A. Claire scored 1.23% below the mean

B. Claire’s mark is 1.23 standard deviations above the mean.

C. The marks on the exam have a standard deviation of 1.23

D. 1.23 percent of the students did better than Claire