Introduction to the Practice of Statistics

The third quartile will be the seventh data value: 69 inches. Example: Using our 8 female sample of heights, the locator would be: 75% of 8 is 0.75(8) = 6. Since this value is a whole number, we will find the mean of the 6th and 7th data values: (67+69)/2 = 68, so the third quartile is 68 inches. ................
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