Key Points Random sampling is a random means of gathering data points from all groups. It eliminates bias within your data ...

With systematic sampling you can then select the points to monitor but this can introduce bias. Random sampling eliminates bias by generating the points randomly. Now you need sampling tools.

If you are using the wrong kind of sampling method for your experiment, this can lead to biased results. Sampling of the area you are studying must be random. It must show no bias – for instance ...