A digital UX researcher is investigating whether the design of a mobile app's navigation menu affects the time taken to complete a checkout process. Ten participants are randomly allocated to one of two conditions:
The time taken (in seconds) to complete the checkout is recorded for each participant. The data collected is presented in the table below:
| Participant | Condition X Time (Tab Bar) | Condition Y Time (Hamburger) |
|---|---|---|
| 1 | 18 | 29 |
| 2 | 15 | 32 |
| 3 | 22 | 28 |
| 4 | 19 | 35 |
| 5 | 17 | 31 |
Draw a fully labelled bar chart showing the mean checkout time for each condition. Plot the means 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.