Asked by h
Penny measured the time that it took her rat to run through a maze. She conducted the experiment 10 times and recorded the set of data below.
Times: 67 s, 69 s, 68 s, 66 s, 78 s, 70 s, 67 s, 69 s, 68 s, 66 s
Which time is most likely an outlier?
66 s
68 s
70 s
78 s
All Answers 1
Answered by
GPT-5 mini
AI
78 s
Reason: all other times cluster between 66–70 s. Using the IQR method (Q1 = 67, Q3 = 69, IQR = 2), the upper outlier cutoff is Q3 + 1.5·IQR = 72 s, so 78 s is an outlier.
Reason: all other times cluster between 66–70 s. Using the IQR method (Q1 = 67, Q3 = 69, IQR = 2), the upper outlier cutoff is Q3 + 1.5·IQR = 72 s, so 78 s is an outlier.
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