Results from the Wechsler Adult Intelligence Scale, a common IQ test, are approximately normally distributed with a
Question:
Results from the Wechsler Adult Intelligence Scale, a common IQ test, are approximately normally distributed with a mean of 100 and a standard deviation of 15.
a. If a person is randomly chosen from the population, what is the probability that his or her score is 110 or more?
b. If 10 people are randomly chosen from the population, what is the probability that the mean of their 10 scores is 110 or more?
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Related Book For 
Introduction To Statistical Investigations
ISBN: 9781119683452
2nd Edition
Authors: Beth L.Chance, George W.Cobb, Allan J.Rossman Nathan Tintle, Todd Swanson Soma Roy
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