Out of 1000 employees, 100 have to be selected for a survey. After being arranged in the alphabetical order, each one is assigned a number from 1 to 1000. A number 4 is randomly selected and then every $10^{th}$ person is selected (i.e : 4, 14, 24..)

Which form of sampling is this an example of ?

Systematic sampling

The correct answer is Option (4) → Systematic sampling

This method of selecting every 10th person after randomly selecting the first individual is an example of systematic sampling.