Biological investigations often result in large amounts of data being collected. It is important to be able to analyse this data carefully in order to pick out trends.

Activity 5 Mean, median, mode and scatter graphs

Calculate:

1. the mode area of soft rush in the sample.

2. the mean soil depth.

3. the median amount of bare ground in the sample.

Use the data from the table to plot a scatter graph of soil depth against area covered by bare ground, soft rush and bog moss. What conclusions does your graph suggest?