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6.1 question 19 school grades: Scores on a statistics final in a large class were normally...

6.1 question 19

school grades: Scores on a statistics final in a large class were normally distributed with a mean of 74 and a standard deviation of 8. Use the TI-84 PLUS calculator to answer the following. Round the answers to at least four decimal places.
(a) What proportion of the scores were above 85?

(b) What proportion of the scores were below 63?

(c) What is the probability that a randomly chosen score is between 65 and 82?

Math   Statistics-And-Probability   
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