The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0.951 g and a standard deviation of 0.292 g. The company that produces these cigarettes claims that it has now reduced the amount of nicotine. In what range would you expect to find the middle 70% of amounts of nicotine in these cigarettes (assuming the mean has not changed)?

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If you were to draw samples of size 50 from this population, in what range would you expect to find the middle 70% of most average amounts of nicotine in the cigarettes in the sample?

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