Class 7 Maths Part 2 Chapter 5, Connecting the Dots…, introduces statistical thinking and data analysis—computing and interpreting the arithmetic mean (average as fair share) and median, spotting how outliers skew the mean, reading double bar graphs and line graphs, and acting as a ‘Data Detective’.
What Class 7 Mathematics Chapter 5 Covers
5.1–5.2 Representative Values: Mean, Median & Outliers explains statistical questions, models the arithmetic mean (average) as a ‘fair share’ ($\text{Sum of values} \div \text{Number of values}$), introduces the median (middle value of sorted data), and shows why the median is more robust when extreme outliers are present.
5.3–5.4 Visualising Data & Data Detective constructs and interprets clustered (double) bar graphs, time-series line graphs (comparing northern and southern hemisphere daylight hours) and dot plots to draw evidence-based conclusions.
Exercises in Chapter 5
- Figure it Out exercise sets and Summary with geometric and algebraic puzzles.
Read Class 7 Mathematics Chapter 5 Online
More Chapters
- Previous: Chapter 4: Another Peek Beyond the Point
- Next: Chapter 6: Constructions and Tilings
- All Mathematics chapters and the other Class 7 books: Class 7 NCERT books 2026-27
FAQ
What is the difference between the mean (average) and the median of a dataset?
The mean (average) is found by adding all data values and dividing by the total number of values, whereas the median is the middle value when the data is arranged in ascending or descending order.
When is the median a better representative value than the mean?
When a dataset contains one or two extreme values (outliers) that are much higher or lower than the rest, the mean gets pulled toward the outlier, whereas the median stays representative of the typical middle value.