A laboratory group carried out three separate trials to estimate the duration of protein digestion by pancreatic protease at pH 8. The recorded durations were as follows.
| Trial | Duration of digestion in s |
|---|---|
| 1 | 48 |
| 2 | 54 |
| 3 | 51 |
Calculate the mean duration of digestion.
304 exam-style questions on AQA GCSE Biology 2.2 Animal tissues, organs and organ systems, covering 2.2.1 The human digestive system, 2.2.2 The heart and blood vessels, 2.2.3 Blood, 2.2.4 Coronary heart disease: a non-communicable disease, 2.2.5 Health issues, 2.2.6 The effect of lifestyle on some non-communicable diseases, and 2.2.7 Cancer. Each one has a worked solution and a mark scheme showing where the marks go.