Track quiz
Keep these seven lines in mind before you answer.
| Idea | The line to keep |
|---|---|
| Two shapes of data | Structured data fits rows and columns. Unstructured data does not. |
| Four ways to collect | Watch it, ask it, measure it, or let a device record it. |
| File formats | A format decides how easily data is read, shared and analysed. |
| Clean first | Remove copies and fix errors and gaps before you count or chart. |
| Bar, line or pie | A bar chart compares groups. A line graph shows change over time. A pie chart shows parts of a whole. |
| Reading a chart | Read the title, the axis labels and units, and the legend first. |
| Precise and accurate | Accuracy is closeness to the true value. Precision is how fine and steady the readings are. |
Which of these is structured data?
A photo of a marks table is saved on a phone. Can a program sort the marks from it directly?
You count the cycles parked at the gate and ask nobody. Which way is this?
A step counter on a phone saves your steps all day. Which way is this?
Which file does a plain text editor show as readable text?
Why does a data format matter?
A table lists the same row twice. What do you do first?
A mark is blank. The source sheet cannot tell you the mark. What is the careful step?
A plant's height is noted every day for a month. How is its change best shown?
Which question fits a pie chart?
A bar shows 4 for week 3. The unit on the axis is thousand litres. How much water is that?
A chart shows water use for four weeks. Which statement stays with what it shows?
A kitchen scale weighs a checked 600 g weight. It shows 612, 611 and 612 g. What is the scale?
A ruler marked in whole centimetres reads 7 cm. A program prints 7.0000 cm. What do the extra zeros add?
What is metadata?
You can now name the shape of data. You know how it was collected and stored. You can clean it, pick a chart and read it with care. You can tell precise from accurate.
Next, AI Ethics & Bias asks what an AI learns from unfair data.