A student investigated the effect of temperature on the rate of photosynthesis in pondweed.
Their results are shown in the table below:
| Temperature of water (∘C^{\circ}\text{C}∘C) | Number of bubbles counted in 2 minutes | |||
|---|---|---|---|---|
| Trial 1 | Trial 2 | Trial 3 | Mean | |
| 20 | 15 | 16 | 14 | 15 |
| 30 | 32 | 11 | 35 | 26 |
| 40 | 48 | 46 | 47 | 47 |
The result for Trial 2 at 30∘C30^{\circ}\text{C}30∘C is anomalous.
State how the student should deal with this anomalous result when calculating the mean.
