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Summary Statistics: Centre & Spread
Use mean, median, and spread to summarize data, and link out to the Statistics course for the theory.
Inside this lesson
- Calculate mean, median, and mode for a dataset
- Compute range, variance, standard deviation, and interquartile range
- Identify when the median is preferable to the mean
- Explain how outliers affect measures of centre and spread
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Educational training content only - not professional, financial, legal, or data-governance advice, and not a promise of any business or analytical result. Examples are illustrative and use hypothetical data with stated assumptions and units. Third-party names are descriptive and imply no affiliation.