random sampling

• what is random sampling?

  sample sites are selected at random, meaning each site has an equal chance of being selected
• what are the advantages of random sampling?

  simple to carry out

  eliminates bias

  good for making generalisations about larger populations

  less knowledge is required about the larger population
• what are the disadvantages of random sampling?

  difficult to achieve true randomness - factors may still impact the selection of sites

  leaves room for error

  sometimes does not provide an accurate representation of the sample area