12. Statistics
Graphical representation of data is crucial for understanding and analyzing information efficiently. This chapter covers various types of graphical representations including bar graphs, histograms for continuous data, and frequency polygons. Key aspects include interpreting these graphs correctly and ensuring they accurately represent the underlying data.
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Sections
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What we have learnt
- Graphical representations like bar graphs and histograms improve the understanding of data.
- The construction of bar graphs involves selecting appropriate scales and maintaining equal widths.
- Histograms require consideration of class intervals and their widths for accurate representation.
Key Concepts
- -- Bar Graph
- A pictorial representation of data where bars of uniform width are drawn with equal spacing, depicting data values on one axis and their corresponding variable on another.
- -- Histogram
- A graphical representation of a grouped frequency distribution for continuous data, showing the frequencies of different class intervals without gaps between them.
- -- Frequency Polygon
- A visual representation of frequency distributions created by joining the midpoints of the tops of the bars of a histogram with line segments.
Additional Learning Materials
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