Grouping data into classes
Mathematics · Grade 10 · about 40 minutes
Why large data sets are grouped, how to choose sensible classes, and what grouping gains and costs.
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- 7 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take
Other lessons in this sub-strand
- What statistics is
- Primary and secondary data
- Methods of collecting data
- Types of data
- A frequency table for ungrouped data
- Mode and median of ungrouped data
- Mean of ungrouped data
- Mean from a frequency table
- Grouping data into classes
- Class limits, boundaries, width and midpoint
- Modal class and the mean of grouped data
- Median of grouped data
- Histograms with equal class widths
- Histograms with unequal class widths
- Frequency polygons
- Interpreting data, and the statistics project