Describing Data - OpenTextBookStore

To find the first quartile, we calculate the locator, L = 0.25(36) = 9. Since this is a whole number, we know Q1 is the mean of the 9th and 10th data values, $250 and $260. Q1 = $255. To find the third quartile, we calculate the locator, L = 0.75(36) = 27. ................
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