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OpenStudy (anonymous):
Please Help MEDAL!! <3 The ages of students in a school are normally distributed with a mean of 15 years and a standard deviation of 2 years. Approximately what percent of the students are between 14 and 18 years old? 24.17% 62.47% 30.85% 93.32%
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OpenStudy (anonymous):
i think it is 62.47%
ganeshie8 (ganeshie8):
Correct ! you may verify your work with wolfram : http://www.wolframalpha.com/input/?i=P%28%2814-15%29%2F2%3CX%3C%2818-15%29%2F2%29
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