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A half-century ago, the mean height of women in a particular country in their 20s was 63.4 inches. Assume that the heights of today's women

A half-century ago, the mean height of women in a particular country in their 20s was 63.4 inches. Assume that the heights of today's women in their 20s are approximately normally distributed with a standard deviation of 2.05 inches. If the mean height today is the same as that of a half-century ago, what percentage of all samples of 24 of today's women in their 20s have mean heights of at least 64.15 inches?

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