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Old 07-28-2007   #1
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Default Probability/Stats Questions?

Can someone please help me solve the following questions?Scores on a test are normally distributed with a mean of 550 and a standard deviation of 80. a) If one subject is randomly selected, find the probability that the score is between 550 and 650. b) If a job requires a score in the top 80%, find the lowest acceptable score. C) If 50 subjects are randomly selected, find the probability that their mean is between 550 and 650.Thanks!!!

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