The mean uses all numeric values, the median identifies the middle of sorted values, and the mode identifies frequent values. They answer different questions and react differently to unusual observations.
Before you begin
Start with a small labeled table and clear units. Basic arithmetic is enough for the initial hand-worked exercise.
Work through the idea
Define the population, measurement and question before calculating. Show the actual values or counts used in the calculation and explain assumptions in plain language. Distinguish a descriptive observation from a causal claim. A small teaching example illustrates a method; it is not evidence about a real population.
- Sort and inspect a small dataset
- Compute each measure
- Explain missing values and repeated modes
Practice task
Compare the summary of delivery times before and after adding one unusually long delay.
Check your result
Explain why the mean shifts more strongly than the median in your example.
A mistake to avoid
Do not report an average without naming the measure and units.
Keep a review note
Save the inputs or scenario, your reasoning and the result you checked. Explain one assumption and one case that needs more work. Revise the exercise after feedback and distinguish what you demonstrated from what remains untested.
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