Sampling and Data Collection Assignment Example | Topics and Well Written Essays - 250 words

Sampling and Data Collection - Assignment Example A research problem where probability sampling is appropriate is in a study of effects of brand modification on a product’s popularity. The research problem targets a diversified population by such factors as age, income, levels of education, and area of residence. Significance of sub-populations, within the factors, may further vary and a representative sample that also factors relative significance of the sub-populations requires a stratified random sampling approach. The population is in the case divided into the subgroups and each group allocated a probability of sampling a participant. Random sampling is a method of obtaining a sample, based on unrestricted probability sampling approach, while random selection is an approach to allocating sampled research participants to different groups in a study (Black, 1999; Christensen, Johnson, and Turner, 2011). Random assignment is important in experimental research situations in which participants are to be assigned to treatment and control