An endocrinologist conducted a study to investigate whether consuming different non-nutritive sweeteners affects postprandial blood glucose levels. An independent measures design was used, testing a sample of 12 healthy adults. Half of the participants consumed a drink sweetened with aspartame, while the other half consumed a drink sweetened with stevia. The blood glucose levels (measured in mmol/L) of the participants two hours post-consumption are recorded in the table below.
| Blood glucose level (mmol/L) after sweetener consumption | |||
|---|---|---|---|
| Aspartame | Stevia | ||
| Participant | Glucose Level | Participant | Glucose Level |
| 1 | 6.8 | 1 | 5.7 |
| 2 | 7.2 | 2 | 6.5 |
| 3 | 6.5 | 3 | 5.9 |
| 4 | 8.1 | 4 | 7.3 |
| 5 | 7.0 | 5 | 6.2 |
| 6 | 6.9 | 6 | 6.1 |
Calculate the mean blood glucose level for the 'Stevia' condition and present your findings to 2 significant figures. 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.