Reliability is important to research process because it shows the consistence of the results of the study.
Reliability helps to test if the research fulfills the aims and hypothesis and ensure there are no extraneous variables in the research process.
Objectivity ensures that the researcher remains in the course the study rather than bias. It helps to get accurate results.
Representativeness in studies refers to having a subset of a population which is used to give characteristics and of a larger population