Proportion of the population
The distribution of IQ scores is normal with µ = 100 and ? = 15. What proportion of the population has IQ scores greater than 115?
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For a normal distribution, find the z-score values that separate the middle 60% of the distribution from the 40% in the tails.
For a normal distribution, find the z-score values that separate the middle 70% of the distribution from the 30% in the tails.
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