Module 4 Summary: Centre, Spread, and Distribution Shape

What You Practised

You practised how to describe numeric data with centre, spread, shape, and outlier caution.

Keep These Ideas

• The mean uses every value and is sensitive to outliers.
• The median is the middle value and is often safer for skewed data.
• Spread and shape tell whether the centre is enough to understand the data.

Writing Habit

The South-zone median is more useful for a typical order, but the very late order still matters as a service-risk signal.

Before Moving On

You are ready for the next module when you can explain the module idea without reading the answer key and can name the main unsafe claim to avoid.