The scores of students on the ACT college entrance examination in a recent year had a normal distribution with mean 25 and a standard deviation 3.9. What ACT score should a student have in order to be in the top 5% of test-takers? (use 3 decimals)
z score corresponding to top 5% area = 1.645
Hence,
Required ACT score to be in top 5% of test - takers
= 25 + 1.645*3.9
= 31.416
The scores of students on the ACT college entrance examination in a recent year had a...
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