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Concept Maps

Statistics — Concept Maps

Tamil Nadu Board · Class 9 · Mathematics

3 concept maps of Statistics for Tamil Nadu Board Class 9 Mathematics, each also written out as a text outline.

45 questions25 flashcards4 formulas & key relations5 concepts

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An illustration comparing raw (ungrouped) data, arrayed data (sorted), and tabulated data (organized in a basic table with categories and totals).
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3 Concept Maps

Statistics Chapter Overview Mind Map

Statistics Chapter Overview Mind Map

The map in words

  • Statistics
    • Data
      • Primary Data
        • Surveys
        • Experiments
        • Interviews
      • Secondary Data
        • Govt Reports
        • Published Research
      • Raw Data
        • Frequency Table
        • Tally Marks
        • Class Intervals
    • Mean
      • Raw Data
        • Sum divided by n
      • Ungrouped Frequency
        • Sigma fx by Sigma f
      • Grouped Frequency
        • Direct Method
        • Assumed Mean Method
        • Step Deviation Method
      • Special Properties
        • Sum of deviations is zero
        • Add or subtract k changes mean by k
        • Multiply or divide by k changes mean by k
    • Median
      • Positional Average
      • Raw Data Odd n
        • n plus 1 by 2 th value
      • Raw Data Even n
        • Average of two middle values
      • Ungrouped Frequency
        • Cumulative frequency table
      • Grouped Frequency
        • Median formula with l m f c
    • Mode
      • Most frequent value
      • Raw Data
        • Count occurrences
      • Ungrouped Frequency
        • Highest frequency value
      • Grouped Frequency
        • Modal class
        • Mode formula with f f1 f2
      • Types
        • Unimodal
        • Bimodal
        • Multimodal
    • Empirical Relation
      • Mode equals 3 Median minus 2 Mean

Statistics Chapter - Complete Concept Map

Statistics Chapter - Complete Concept Map

The map in words

  • Statistics
    • Data Types
      • Primary Data
        • Direct Collection
        • Surveys
        • Experiments
      • Secondary Data
        • Government Records
        • Research Reports
        • Published Statistics
    • Data Organization
      • Raw Data
        • Unorganized
        • Difficult to Analyze
      • Frequency Table
        • Class Intervals
        • Tally Marks
        • Frequencies
    • Measures of Central Tendency
      • Arithmetic Mean
        • Direct Method
        • Assumed Mean Method
        • Step Deviation Method
      • Median
        • Ungrouped Data
        • Grouped Data
        • Position Average
      • Mode
        • Most Frequent Value
        • Ungrouped Data
        • Grouped Data
    • Applications
      • Business Decisions
      • Quality Control
      • Performance Analysis
      • Market Research

Mind map showing the types of data collection methods and their categories

Mind map showing the types of data collection methods and their categories

The map in words

  • Data Collection
    • Primary Data
      • Interviews
      • Surveys
      • Experiments
      • Observations
    • Secondary Data
      • Government Reports
      • Research Publications
      • Existing Records
      • Websites

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Frequently Asked Questions

What are the important topics in Statistics for Tamil Nadu Board Class 9 Mathematics?
Key topics in Statistics include Data and Its Types, Arithmetic Mean, Median, Mode. Study these first, then practise questions on each for Class 9 exams.
What do the concept maps for Statistics show?
The 3 maps show how the ideas in Statistics connect: Statistics Chapter Overview Mind Map; Statistics Chapter - Complete Concept Map. Each map is also written out as an outline on this page.
How should I revise Statistics for Class 9 exams?
Learn the core ideas first, then work through the 45 practice questions on Statistics. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Statistics

All Tamil Nadu Board Class 9 Mathematics Concept Maps

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