A student investigated the rate of photosynthesis by measuring the volume of oxygen gas collected from a pondweed stem over a series of 10-minute trials at a constant light intensity.
Their results are shown in the table below:
| Trial | Volume of oxygen collected in mm3\text{mm}^3mm3 |
|---|---|
| 1 | 54.0 |
| 2 | 48.0 |
| 3 | 15.0 |
| 4 | 51.0 |
| 5 | 57.0 |
Identify the anomalous trial, and calculate the range of the rate of oxygen production in mm3 min−1\text{mm}^3\text{ min}^{-1}mm3 min−1 using only the repeatable (concordant) trials.
4.2 mm3 min−14.2\text{ mm}^3\text{ min}^{-1}4.2 mm3 min−1
0.9 mm3 min−10.9\text{ mm}^3\text{ min}^{-1}0.9 mm3 min−1
9.0 mm3 min−19.0\text{ mm}^3\text{ min}^{-1}9.0 mm3 min−1
42.0 mm3 min−142.0\text{ mm}^3\text{ min}^{-1}42.0 mm3 min−1
