Suppose 150 people take a quiz, and say the mean score was a 100 out of 200 points, with a standard deviation of 40. Suppose the scores are distributed in a normal probability distribution. Approximately how many people got above a 180? what is the probability that someone got between a 91 and 157 on the quiz? (round your answer to three digits after the decimal).

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Suppose 150 people take a quiz, and say the mean score was a 100 out of 200 points, with a standard deviation of 40.
Suppose the scores are distributed in a normal probability distribution. Approximately how many people got above a 180?
what is the probability that someone got between a 91 and 157 on the quiz? (round your answer to three digits after
the decimal).
Transcribed Image Text:Suppose 150 people take a quiz, and say the mean score was a 100 out of 200 points, with a standard deviation of 40. Suppose the scores are distributed in a normal probability distribution. Approximately how many people got above a 180? what is the probability that someone got between a 91 and 157 on the quiz? (round your answer to three digits after the decimal).
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