Scores on a recent national statisticsexam were normally distributed with a meanof 80 and a standard deviationof 6.
a. What is the probabilitythat a randomly selected exam will have a score of at least 71?
b. What percentage of exams will have scores between 89 and 92?
Let X be the score on a recent national statistics exam.
a. What is the probability …
This solution shows how to find the probability of an event, i.e. that an exam will have a certain score, and how to find the percentage of exams that have scores that fall within a specified range.