concepts · 14
- 01
Statistical Questions And Statements
Tell a statistical question, one answered by collecting data that varies, from a question with one fixed answer.
- 02
The Average: One Number For A Whole Group
Use the mean to compare groups of different sizes, and see it as the fair share when everything is shared equally.
- 03
Know Your Onions: Comparing Data And Dot Plots
Compare two towns' onion prices using minimum, maximum, total, range and mean, and see the spread on a dot plot.
- 04
Outliers And The Median
Find the median for odd and even counts, spot outliers, and see how an outlier pulls the mean away from the median.
- 05
How Tall Is Your Class? Spread And Centre
Answer 'How tall is the class?' using both the spread (minimum and maximum) and the centre (mean and median) of dot plots.
- 06
Zero Median Runs: Zero Is Data, 'Did Not Play' Is Not
Treat 0 as a real value but leave out missing ones, and choose sensible data to average: England's 407 and Sita's mango tree.
- 07
Mean And Median Workshop
Practise choosing and finding the mean and median for real data: date palms, pets, tap water, newborn babies and sumo wrestlers.
- 08
Clubbing The Columns: Double Bar Graphs
Read a double bar graph using its scale, and draw one from raw data with a sensible scale and a legend.
- 09
Read A Graph Like A Detective: Rockets And Sunshine
Read complex graphs in two steps, identify what is shown and then infer, and check which statements the data can support.
- 10
Graphs In The Wild: Cricket, Animal Speeds And Electric Vehicles
Read three real-world graphs, a T20 runs-per-over chart, animal speeds and EV registrations, and spot claims they can't support.
- 11
Data Detective: Telling Tall Tales About Heights
Investigate 30 years of Indian children's average heights, test claims against the table, and estimate from the trend.
- 12
Data Detective Casebook
Solve mixed data cases: compare pockets, quiz scores and Sudoku times, split a class at the median, and check claims about skyscrapers.
- 13
Be A Data Collector: Projects With Your Own Data
Plan, collect, show and summarise your own data: estimating lengths, sentence lengths, names, and how long a minute feels.
- 14
Review: Connecting The Dots
Check what you can now do with data, revise mean, median, outliers and graphs, and crack the chapter's lock puzzle.