Question: how to calculate the interquartile range?
Answer: Step 1: Put the numbers in order. ...  Step 2: Find the median. ...  Step 3: Place parentheses around the numbers above and below the median. Not necessary statistically, but it makes Q1 and Q3 easier to spot. ...  Step 4: Find Q1 and Q3. ...  Step 5: Subtract Q1 from Q3 to find the interquartile range.