What is the probabilitythat a randomly selected exam

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Reference no: EM13331543

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

µ = 80; σ = 6

a. What is the probabilitythat a randomly selected exam will have a score of at least71?

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

c. If the top 2.5% of test scoresreceive merit awards, what is the lowest score eligible for anaward?

d. If there were 334 exams with scores of atleast 89, how many students took the exam?

Reference no: EM13331543

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