Probability Percentages
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On standard IQ tests, the mean is 100, with a standard deviation of 15. The results are very close to fitting a normal curve. Suppose an IQ test is given to a very large group of people. Find the percent of those people
whose IQ scores are as follows.
More than 130
Less than 85
Between 85 and 115
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Solution Summary
A complete, neat and step-by-step solution is provided with regards to probability percentages.
Solution Preview
mu = 100, sigma = 15; z = (x - mu)/sigma
(a) z = (130 - 100)/15 = ...
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