Leaves were collected from the plant of a certain species growing in a shaded site and a plant from the same species growing in an open site. The surface area of each leaf was worked out. The results obtained are shown in the table below.
Surface area of leaves (cm3) |
Shaded site | Open site |
21 14 16 18 19 21 19 22 18 16 13 22 21 23 19 18 15 | 15 17 18 17 17 19 13 14 21 13 16 13 16 12 14 22 20 |
Mean surface area = x1 | Mean surface area = x2 |
- Calculate the mean score x1 and x2
- Suggest one reason for the differences in the mean surface areas between the leaves from the two sites. Explain your answer.