Attribute Box Plot

📦 What is this?

Imagine putting all data into a delivery box and only looking at the most important points. The box plot is this box.

It doesn't look at details, only the overall overview: the top lid (maximum value), the bottom (minimum value), and the middle belt (median).

🧐 How to read?

• Box (square): Contains the middle 50% of data. The shorter the box, the closer everyone is (small variance).
• Horizontal lines (whiskers): Two lines above and below, connecting the maximum and minimum values.
• Circles (outliers): If there's a point outside the box, it's a troublemaker (outlier).

🛠️ How to use?

• Quick comparison: If you have several variables (such as scores of several classes), draw their boxes side by side to see who is higher or lower at a glance.
• Catch troublemakers: As long as you see circles outside the box, you know someone didn't take the exam seriously.