Question 4: (15 points) 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?
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We are given that the population mean ($\mu$) is 100 and the population standard deviation ($\sigma$) is 15. Show more…
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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?
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The Intelligence Quotient (IQ) test scores for adults are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability we could select a sample of 50 adults and find the mean of this sample is less than 95? 0.9818 0.0091 0.4909 0 0.9544
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