## Elementary Statistics: A Step-by-Step Approach with Formula Card 9th Edition

Arranging the values in ascending order, we have: Minimum = 147 Maximum = 632 Median is the average of middle values = (243+303)/2 = 273 $Q_{1}$ is the median of values below median or at 25% of values, hence: $Q_{1}$ = 156 $Q_{3}$ is the median of values above median or at 75% of values, hence: $Q_{3}$ = 543 IQR = $Q_{3} - Q_{1} = 543-156 = 387$