Table 1 shows the results of an investigation comparing the shell diameters of limpets at two different locations on a rocky shore.
Table 1
| Limpet | Shell diameter at Location X (mm) | Shell diameter at Location Y (mm) |
|---|---|---|
| 1 | 22 | 14 |
| 2 | 24 | 16 |
| 3 | 25 | 38 |
| 4 | 21 | 15 |
| 5 | 23 | 15 |
| Mean | 23 | 15 |
Why did the student exclude the value of 38 mm when calculating the mean shell diameter for Location Y?
It was the first measurement taken.
It is an anomalous result.
It is the modal value of the data set.
It was not measured in millimetres.
