The Wechsler Adult Intelligence Scale is standardized to have a mean of 100 and a standard deviation of
If we draw a random sample of 25 people from the population, what is the probability of obtaining
(a) a sample with a mean IQ of 95 or less?
(b) a sample with a mean IQ of 105 or greater?
(c) Within what central limits would 95% of the sample means fall?