A researcher investigated commuter choices in a corporate office building to see if environmental signage influenced whether employees took the stairs or the elevator. They placed a prominent "Active Steps" poster near the elevators and recorded the transport choices made by senior directors and administrative staff during the morning arrival window (8:00 am to 9:30 am).
The recorded frequencies of their choices are presented in the table below:
| Senior Directors | Administrative Staff | |
|---|---|---|
| Took Stairs | 14 | 32 |
| Took Elevator | 26 | 18 |
The researcher used a Chi-square test of association to analyse the data from this study.
Give one reason why this is the appropriate non-parametric statistical test to use.
513 exam-style questions on OCR A Level Psychology Data recording, analysis and presentation. Each one has a worked solution and a mark scheme showing where the marks go.