A sample of final exam scores is normally distributed with a
mean equal to 21 and a variance equal to 16.
Part (a)
What percentage of scores are between 17 and 25? (Round your
answer to two decimal places.)
%
Part (b)
What raw score is the cutoff for the top 10% of scores? (Round your answer to one decimal place.)
Part (c)
What is the proportion below 14? (Round your answer to four decimal places.)
Part (d)
What is the probability of a score less than 28? (Round your answer to four decimal places.)
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