text: If the sample size is not a multiple of four, some of the quartiles may be numbers in the original data set, as in this example: i x[i] 1 102 2 105—Q[1] = 105 3 106 ------------- Q[2] = 107.5 4 109 5 110—Q[3] = 110 6 112 In both of the above cases, the first and third quartiles can be taken to be