Collecting and showing data
Collecting data
- A tally table: make a mark for each value, then count them up.
- A two-way table sorts data by two features at once (e.g. boys/girls against walk/bus).
Practice
A two-way table sorts data by how many features at once?
A two-way table cross-tabulates two features (e.g. gender vs transport).
Practice
A table where you make a mark for each value, then count, is a ______ table.
A tally table records each value with a mark before counting.
Reading data honestly
- When you read a chart or table, only draw conclusions the data really supports.
- Don't assume a trend that isn't shown, or causes that aren't proven.
Practice
You should only draw conclusions that the data really supports.
Over-claiming beyond the data is a common exam error to avoid.
You've got it
Key idea
- a tally table counts values with marks
- a two-way table sorts by two features at once
- only conclude what the data actually shows