Scores on a recent national statistics exam

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Reference no: EM13337889

Scores on a recent national statistics exam were normallydistributed with a mean of 80 and a standard deviation of 6.

a. What is the probability that a randomly selected exam will havea score of at least 71?

b. What percentage of exams will have scores between 89 and 92?

c. If the top 2.5% of test scores receive merit awards, what is thelowest score eligible for an award?

d. If there were 334 exams with scores of at least 89, how manystudents took the exam?

Reference no: EM13337889

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