Grouping Data (Grade 10 NSC Matric Mathematics): Flashcards
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Grouping data
Grouping data
Dividing continuous data into sub-ranges/classes for analysis
Class intervals must be...
Class intervals must be...
Non-overlapping
Class intervals must provide...
Class intervals must provide...
Complete coverage of entire data span
Histogram
Histogram
Visual representation of grouped data using touching rectangles
Modal group
Modal group
Class interval with highest frequency
Median group
Median group
Class interval containing the middle value
Histogram rectangles...
Histogram rectangles...
Touch each other (no gaps)
Trade-off of grouping data
Trade-off of grouping data
Lose precision, gain clarity in patterns
Optimal number of groups for most datasets
Optimal number of groups for most datasets
5-8 groups
Frequency distribution table
Frequency distribution table
Table showing count of values in each range