CBSE · Class 7 · Mathematics · Chapter 13

Connecting the Dots...

Organise and interpret data using mean, median, mode and different ways of representing information.

13 lessons 50 min
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Lessons in this chapter

  1. 1Of Questions and StatementsLearn to ask clear questions that data can answer and distinguish evidence from assumption.
  2. 2Representative ValuesUnderstand the arithmetic mean through fair sharing and meaningful comparisons.
  3. 3Know Your Onions!Use onion prices to compare means, ranges, and the information revealed by dot plots.
  4. 4Outliers and MediansSee why unusual values affect averages and learn to find the centre of sorted data.
  5. 5Of Ends and the EssenceCompare the centre, spread, and context of data rather than relying on one average.
  6. 6Zero vs. No valueChoose the right observations and denominator by separating genuine zeros from missing data.
  7. 7Visualising DataBuild clear double-column graphs that preserve category comparisons and time patterns.
  8. 810…9…8…7…6…5…4…3…2…1…Take Off!Read a multi-series rocket-launch graph using observation followed by careful inference.
  9. 9Summer and Winter at the Same TimeConvert monthly daylight totals into daily means and explain opposite seasonal patterns.
  10. 10All it Takes is a MinuteRead sports and real-world graphs while separating quantities, changes, ratios, and evidence limits.
  11. 11Data DetectiveInvestigate height patterns while checking samples, predictions, and the limits of averages.
  12. 12Data ProjectsCarry out a manageable investigation from a clear question to a graph and a supported conclusion.
  13. 13Chapter Summary and PracticeRevise the complete chapter with a quick recap, mixed examples, and connected practice.
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