In standard box plots, an observation x is flagged as an outlier if:
Direct Answer: Box Plot Outlier Fence Rule is defined by: A. Tukey’s standard outlier boundary defines fences at Q₁ - 1.5·IQR and Q₃ + 1.5·IQR.
Detailed Step-by-Step Explanation:
Tukey’s standard outlier boundary defines fences at Q₁ - 1.5·IQR and Q₃ + 1.5·IQR.