A marine biologist conducted an experiment to compare the daily carbon dioxide absorption (g/m2g/m^2g/m2) of two different microalgae species, Chlorella vulgaris and Spirulina platensis, cultivated under identical laboratory conditions. Six bioreactors were used for each species, and the daily CO2 CO_2\,CO2 absorption rates recorded at the end of a 24-hour cycle are shown in the table below.
| Daily CO2 CO_2\,CO2 absorption (g/m2g/m^2g/m2) by species | |||
|---|---|---|---|
| Chlorella vulgaris | Spirulina platensis | ||
| Bioreactor | Absorption rate | Bioreactor | Absorption rate |
| 1 | 24.5 | 1 | 18.2 |
| 2 | 26.0 | 2 | 29.5 |
| 3 | 23.8 | 3 | 12.1 |
| 4 | 25.2 | 4 | 25.4 |
| 5 | 24.1 | 5 | 15.6 |
| 6 | 25.8 | 6 | 21.0 |
Identify two findings from the data presented in this table.
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.