The Intelligence Quotient (IQ) test scores for adults are normally distributed with a population mean of 100 and a population standard deviation of 15. (i) What is the probability we could select a sample of 50 adults and find the mean score of this sample is less than 95? (ii) What is the probability we could select a sample of 50 adults and find the mean score of this sample is between 94 and 106?
Added by Hannah W.
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We are dealing with a normal distribution of IQ scores with a mean (μ) of 100 and a standard deviation (σ) of 15. We need to find the probability of two different scenarios involving the mean IQ scores of samples of 50 adults. Show more…
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