PSYCH 10 PSYCHOLOGICAL ASSESSMENT PRELIM LEARNING CHECK! QUARTILE, DECILE & PERCENTILE Using the data below, calculate for the following: 1. Quartile: a. Q2 b. Q3 2. Decile: a. D5 b. D7 3. Percentile: a. P50 b. P75 X 8 9 10 12 17 18 18 19 20 21 ∑X= 152