Given:
Quartile 1 = 51
Quartile 3 = 67
Interquartile range = Q₃ - Q₁
IQR = 67 - 51
IQR = 16
Inner fence of the data set:
16 x 1.5 = 24
67 + 24 = 91
51 - 24 = 27
Boundaries of inner fence are 27 and 91
16 x 3 = 48
67 + 48 = 115
51 - 48 = 3
Boundaries for outer fence are 3 and 115
C. 93 is an outlier. It is a minor outlier based on the boundaries of the inner fence.