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Frequency distributions
Understand the distinction between ungrouped and grouped frequency distributions, such as those defined by ranges like 30 to under 40, and recognize the pros and cons of consolidating data into a grouped frequency distribution.
6
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60
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42
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90 min
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CambridgeIGCSEStatisticsFrequency distributions
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Frequency distributions outcomes6 objectives
- Understand the distinction between ungrouped and grouped frequency distributions, such as those defined by ranges like 30 to under 40, and recognize the pros and cons of consolidating data into a grouped frequency distribution.
- Identify the class limits, boundaries, midpoints, and widths for a grouped frequency distribution, noting that these will differ for discrete and continuous data.
- Create a histogram to represent a grouped frequency distribution and be able to interpret the information presented in the histogram, including cases with unequal class widths where the vertical axis is labeled 'frequency density'.
- Represent a grouped frequency distribution using a frequency polygon and interpret the resulting graph, including the ability to compare two frequency distributions.
- Construct a cumulative frequency distribution from a given frequency distribution and vice versa, demonstrating the ability to switch between these two forms.
- Illustrate the cumulative frequency distribution of a continuous variable using a cumulative frequency polygon or curve, and interpret the information conveyed by this representation.
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