The data below represents the amount of grams of carbohydrates in a sample serving of breakfast cereal. 10 18 24 30 19 22 24 20 18 25 20 22 19What is the interquartile range (midspread) for this data?

Answer 1

1. Place the data in ascending order.
2. Group the data into two equal parts. You have an odd number of pieces of data, so put brackets around the first six numbers, leave the middle number on its own, and put brackets around the last six numbers.
3. Find the median of the first group of numbers. This is called Q1.
4. Find the median of the second group of numbers. This is called Q3.
5. Q3 - Q1 is the interquartile range.