6.1. Random and non-random sample selection methods
There are numerous sample selection methods for drawing the sample from the population, broadly classified into random or probability-based sampling schemes or survey design methods, and non-random or non-probability based sampling. An overview may be found for example in Schaeffer et al. (1990) or any such survey sampling textbook. A number of terms relating to surveys are introduced in the following sections, and may all also be found in such standard texts. The main methods which might be used for sampling beekeepers are summarised in Table 1. Some more detail is given about each method below. In general those methods higher up in the table will cost more, but will give more reliable results, provided that a good response rate can be achieved.