To be considered for pilot school, 12 students took a spatial reasoning test that resulted in this list of scores. find the percentile for the score value 117. 152 121 130 143 122 101 137 98 138 127 145 117 a. 17th percentile b. 25th percentile c. 83rd percentile d. 77th percentile

a. 17th percentile First, take the data and sort it in increasing order, getting: 98 101 117 121 122 127 130 137 138 143 145 152. The score of 117 is greater than 2 of the scores out of a total of 12 scores. So the percentile rank is 2/12 = 0.1666667 = 16.66667, or the 17th percentile. Therefore the answer is "a. 17th percentile"