A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.

She picks the student in every 5th seat.

Involves choosing the respondents of the study on the basis of pre- determined criteria set by the researcher

1.Totality of all values (or measurements) of a particular characteristic for a specified group of objects that are of interest to the researcher.

The process of choosing a representative portion of a population.

This sampling system works like a networking business referral program.

Is used when the population is made up of groups of items with different characteristics

Involves a method where the researchers divides a more extensive population into smaller groups (strata) that usually don’t overlap but represent the entire population.

This type of sampling procedure gives equal chances to the members of the population to be part of the sample.

What kind of sampling technique is the following:

List the names of all the students alphabetically and contact the parent of every 25th student.