Z-score values that separate the middle
For a normal distribution, find the z-score values that separate the middle 60% of the distribution from the 40% in the tails.
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Find the actual percentages of observations within one, two , and three standard deviations of the mean?
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For a normal distribution, find the z-score values that separate the middle 70% of the distribution from the 30% in the tails.
Tin atoms are introduced into an FCC copper crystal, producing an alloy with a lattice parameter of 3.7589*10^-8 cm and a density of 8.722 g/cm^3. Calculate the atomic percentage of tin present in the alloy.
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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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