Sampling Strategy

Question 1

Random - advantages

Answer 1

Unbiased approach to sampling which reduces the potential of subjective choices of site locations
Allows every site within the chosen sample area to have an equal chance of being chosen

Question 2

Random - disadvantages

Answer 2

Random sites can lead to a clustering of sites being studied which would lead to an over representation of one area
Since anywhere can be chosen it can lead to sites that ‘ought to be’ chosen being ignored

Question 3

Random - examples

Answer 3

To ask a random selection of pedestrians for a questionnaire when it makes no difference what age or gender they are