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Assume that an intelligence test is constructed to have the normal distribution with mean of 100, and standard deviation of 15.

i) Between what two scores symmetrically distributed around mean will 50% of the people IQ scores have?

ii) Find out the interquartile range of this IQ score distribution.

iii) If 400 people were randomly selected, compute the probability that at least 315 people have IQ scores between 82.0 and 121.0.

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Statistics and Probability, Statistics

Category:- Statistics and Probability
Reference No.:- M91120380

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