Question
I developed an achievement test and normalized it on people throughout the country over a year. My test has scores that are normally distributed with
I developed an achievement test and normalized it on people throughout the country over a year. My test has scores that are normally distributed with a mean of 100 and a standard deviation of 9.
a.Find the probability that a randomly selected adult has IQ < 115
The probability of an IQ score being less than 115 is 0.6915.
b.Find the probability that a randomly selected adult has IQ > 90
c.Find P30, which is the IQ score at the 30th percentile.
What percentage of adults have scores between 91 and 109?
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Stochastic Calculus And Applications
Authors: Samuel N Cohen, Robert J Elliott
2nd Edition
1493928678, 9781493928675
