What is the method of sampling in which the units are picked up at regular intervals from the universe?: (A) Simple random sampling, (B) Systematic random sampling, (C) Stratified random sampling, (D) Snow ball sampling
Answer is B. Systematic sampling is a type of probability sampling method in which sample members from a larger population are selected according to a random staing point but with a fixed, periodic interval. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 913