The reaction time (in seconds) to a stop at a red light for a group of adult men was found to be
0.74, 0.71, 0.41, 0.82, 0.74, 0.85, 0.99, 0.71, 0.57, 0.85, 0.57, 0.55

-What are the outer fences?
A)-.225,1.63
B)16125,1.25125
C)97875,1.25125
D)1.3875,1.66
E)40875,.8175

Question

The reaction time (in seconds) to a stop at a red light for a group of adult men was found to be
0.74, 0.71, 0.41, 0.82, 0.74, 0.85, 0.99, 0.71, 0.57, 0.85, 0.57, 0.55

-What are the outer fences?
A)-.225,1.63
B)16125,1.25125
C)97875,1.25125
D)1.3875,1.66
E)40875,.8175

Quizplus · Accepted Answer

Outer fences are calculated using the formula: Q1 - 1.5*IQR and Q3 + 1.5*IQR, where Q1 and Q3 are the first and third quartiles, respectively, and IQR is the interquartile range (Q3-Q1). For the given data, after sorting: 0.41, 0.55, 0.57, 0.57, 0.71, 0.71, 0.74, 0.74, 0.82, 0.85, 0.85, 0.99, Q1 = 0.57, Q3 = 0.82, IQR = 0.25. Thus, the outer fences are 0.57 - 1.5*0.25 = -0.225 and 0.82 + 1.5*0.25 = 1.63.

The Reaction Time (In Seconds) to a Stop at a Red