Answer:
Before proceeding to data collection process, the sampling technique is considered a critical concern to the research in order to represent the targeted population and to eliminate the bias in the data collection methods and thus generalise the results. there are four critical issues to be considered when designing the sample as follows; (1) the choice of probability or non-probability sample technique; (2) the sample frame; (3) the size of sample; (4) the response rate.
It is common for a research to recognise the importance of collecting information
from the respondents that represent the entire population due to time and financial constraints. when designing a sample, the researcher should consider several decisions and take into account t
Contrary to probability sampling, the concept of non-probability sampling is
based on non-random selection of sample and thus not all the elements within the population has equal or known chance of selection. The non-probability sampling technique includes judgemental, Quota, snowball and convenience sampling methods.
you have to remember that non-random sampling technique has a selection bias, therefore, cautious when generalisation of findings as the sample is not a representative of the whole population.
