Question

purposive sampling

Answer 1

Purposive sampling

Sampling is a process or technique of obtaining a representative sample. Sample refers to a representative item from a population or a whole group, that shows the characteristics of the whole group. ( tasting a spoon of curry to know wheather the whole curry in the vessel got cooked) In Research/ statistics samples refers to a subset of population selected for measurement, observation or questioning, to provide statistical information about the population.

Purposive sampling: It is a non probability sampling technique where the researcher selects the samples based on the objective of the research study. Samples are taken based on choice not on chance. Purposive sampling also known as judgemental or subjective sampling. For example ' A study to assess the Risk for PCOD( polycystic ovarian syndrome) among adolescent girls' here the researcher selects the adolescent girls as samples based on the objective of the study.

Advantages

1) A wide variety of types are available in purposive sampling such as heterogeneous sampling( different or extreme variety of characteristics among samples. ex: male and female), homogenous sampling( samples share same characteristics. ex: same gender), whole population sampling ( examining the entire population have same characteristics)

2. Easy to obtain the samples

Disadvantages

1. Chances of researcher bias

2. As it is nonprobabilty sampling, the representativeness of sample is difficult to prove. Because of subjective selection.