What is the method of sampling in which the units are picked up at regular intervals from the universe?
Simple random sampling
Systematic random sampling
Stratified random sampling
Snow ball sampling
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
Epidemiology