Using the 1.5 * IQR (Interquartile Range) rule of thumb, there don't appear to be any significant outliers. Q3 = 400 Q1 = 200 IQR = 400-200 = 200

Using the 1.5 * IQR (Interquartile Range) rule of thumb, there don't appear to be any significant outliers. Q3 = 400 Q1 = 200 IQR = 400-200 = 200 1.5 * IQR = 300 300 + 400 = 700 200 - 300 = 0 (can't have negative years) All of the data points fall within that 0-700 year range.