Research suggests that, when trying to alter habits, direct instructions are not always as effective as subtle environmental changes ("nudge theory"). To investigate this, a researcher conducted an observational study of hand-sanitizer use in a busy hospital foyer. They monitored two dispensers positioned near each other—one had a bright glowing LED indicator above it (the nudged condition), while the other was a standard dispenser with no indicator. Recordings were made of every individual who used either dispenser during a continuous period from 8:00 am to 12:00 pm. The usage data is summarised below:
| Males | Females | |
|---|---|---|
| Dispenser with glowing light | 14 | 20 |
| Standard dispenser | 8 | 13 |
Calculate the percentage of people who used the dispenser with the glowing light. 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.