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OpenStudy (anonymous):
Normal Distribution The time required to finish a test is normally distributed with a mean of 60 minutes and a standard deviation of 10 minutes. What is the probability that a student will finish the test in less than 70 minutes? HELP!! WILL FAN AND MEDAL!
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OpenStudy (elonasushchik):
take the Z-score of 70. find the distribution of the percentage of the score. Than compare it to the standard distributionstable of Z scores. z=70−60σ your z score is 1 so the percentage from the table of distribution .84134.
OpenStudy (elonasushchik):
the percentage is 84.1 %
OpenStudy (anonymous):
Thanks girl!
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