Mathematics, 31.03.2020 00:24, laqu33n021

A researcher wants to investigate the effects of environmental factors on IQ scores. For an initial study, she takes a sample of people who grew up as the only child. She finds that of them have an IQ score over . It is known that of the general population has an IQ score exceeding . Find the mean of , where is the proportion of people with IQ scores over in a random sample of people. Find the standard deviation of . Compute an approximation for , which is the probability that there will be or more individuals with IQ scores over in a random sample of . Round your answer to four decimal places.

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A researcher wants to investigate the effects of environmental factors on IQ scores. For an initial...