Computing & AI Class 7
Data Visualisation & Analysis
Collect and clean data, pick the right chart, and read it with care.
10 lessons · ~63 min total
Track progress — 0 of 10 lessons read 0%
Lessons in this topic
- 0 Start here A roadmap: data shapes, collecting, files, cleaning, charts, reading them, precise and accurate readings. · 4 min You are here
- 1 Tidy rows, or loose things Structured data fits rows and columns. Unstructured data does not. · 6 min
- 2 Four ways to collect data Watch it, ask it, measure it, or let a device record it. · 6 min
- 3 Which file holds the data? A format decides how easily data is read, shared and analysed. · 7 min
- 4 Clean the table before you chart Remove copies and fix errors and gaps before you count or chart. · 7 min
- 5 Bar, line or pie? A bar chart compares, a line shows change, a pie shows shares. · 7 min
- 6 Read the chart before you trust it Read the title, labels and unit before you read the bars. · 7 min
- 7 Precise is not the same as accurate Accuracy is closeness to the truth. Precision is fine, steady readings. · 7 min
- 8 The big picture Seven ideas, from the shape of data to precision and accuracy. · 4 min
- 9 Track quiz A cheat sheet for the seven ideas, then fifteen questions. · 8 min
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