Fifteen commute times, in minutes, have this five-number summary: minimum 5, first quartile 25, median 40, third quartile 65, maximum 150. Which value, if any, is a potential outlier?

1. Compute the interquartile range: IQR = 65 - 25 = 40 minutes. 2. Multiply by 1.5: 1.5 x 40 = 60 minutes. 3. The upper fence is the third quartile plus that amount: 65 + 60 = 125 minutes. 4. The lower fence is the first quartile minus it: 25 - 60 = -35 minutes. 5. The maximum, 150 minutes, exceeds the 125-minute fence, so it is flagged as a potential outlier. 6. The minimum, 5 minutes, is above -35, so the low end is clean. 7. Option B misreads the first quartile as a fence; quartiles alone never flag outliers. 8. Option D computes the fence with 1.0 IQR instead of 1.5, giving 105 and the right value for the wrong reason. _Source: OpenStax Introductory Business Statistics (CC BY 4.0), Ch 2 "Descriptive Statistics", section 2.2 Measures of the Location of the Data_