what are the disadvantages of systematic sampling 
the main disadvantage of systematic sampling is that the size of the population is needed without knowing the specific number of participants in a population systematic sampling does not work well for example if a statistician would like to examine the age of homeless people in a specific region but cannot accurately obtain how many homeless people there are then they won t have a population size or a starting point another disadvantage is that the population needs to exhibit a natural amount of randomness to it or else the risk of choosing similar instances is increased defeating the purpose of the sample 