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If 1 SAT score is randomly selceted, find the probablitity that it is less than...
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The SAT scores are normally distributed with a mean of 1518 and a standard deviation of 325. To determine the probability that it is less than 1500, find the z-score of 1500
The z-score for a value x is given by `(x - mu)/sigma`
Here `mu = 1518` and `sigma = 325` .
The z-score is `(1500 - 1518)/325 = -0.0553`
Use a normal distribution table to find the corresponding area for this z-score. The value is 0.4801
There is 48.01% probability that the SAT score is less than 1500
Posted by justaguide on May 26, 2012 at 5:36 AM (Answer #1)
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