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A sample of final exam scores is normally distributed with a mean equal to 28 and...

A sample of final exam scores is normally distributed with a mean equal to 28 and a variance equal to 25.

A. What percentage of scores are between 23 and 33? (Round your answer to two decimal places.)

B. What raw score is the cutoff for the top 10% of scores? (Round your answer to one decimal place.)

C. What is the proportion below 19? (Round your answer to four decimal places.)

D. What is the probability of a score less than 37? (Round your answer to four decimal places.)

Math   Statistics-And-Probability   
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