1. a researcher selects every 12th person admitted to the emergency department with a closed head injury for a research study. this is known as which sampling technique? purposive random systematic purposive

Systematic random sampling technique

Step-by-step explanation:

A systematic random sampling technique is a kind of random sampling method in which a researcher samples participants from a large population by fixing a random beginning point and a fixed periodic interval to select them.

Given : A researcher selects every 12th person admitted to the emergency department with a closed head injury for a research study.

i.e. there is a fixed interval of selection person.

Hence, the this is known as systematic random sampling technique .

p> q if you calculate p is100 q is 79