An urban planning researcher conducted an observational study at a busy junction in a city centre between 10:00 PM and midnight to investigate cycling safety. Specifically, the researcher wanted to determine whether the use of active rear safety lights differed between riders of rental bikes and riders of privately owned bikes.
The collected observational data is shown in the table below.
| Bike Type | Active rear light | No active rear light |
|---|---|---|
| Rental Bikes | 38 | 112 |
| Privately Owned Bikes | 72 | 28 |
Calculate the overall percentage of observed cyclists who had an active rear light. Show your workings.
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.