Research suggests that subtle environmental cues ("nudge theory") can significantly influence decision-making. To investigate this, a researcher conducted an observational study in a busy university canteen during a lunch period. The canteen offered two identical hot-food service lines: one was equipped with a prominent "low carbon footprint" green icon displayed above the menu screen (the nudged line), while the other line was identical but featured a standard neutral menu screen (the standard line). Every student choosing a line was recorded during a continuous period from 11:30 am to 1:30 pm. The selection data is summarised below:
| Undergraduates | Postgraduates | |
|---|---|---|
| Nudged line (green icon) | 53 | 34 |
| Standard line | 24 | 19 |
Calculate the percentage of students who chose the nudged line. Show your workings and present your answer to two significant figures.
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.