A half-century ago, the mean height of women in a particular country in their 20s was 63.1 inches. Assume that the heights of today's women in their 20s are approximately normally distributed with a standard deviation of 2.13 inches. If the mean height today is the same as that of a half-century ago, what percentage of all samples of 29 of today's women in their 20s have mean heights of at least 64.28 inches? About % of all samples have mean heights of at least 64.28 inches. (Round to one decimal place as needed.)

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