Question

 

Discuss two main types of  non- probalistic sampling ,giving examples on each type.

Answer 1

In non-probalistic sampling, individuals are selected based on non-random criteria, and not every individual has a chance of being included .

This type of sampling is easier and cheaper to access, but has a higher risk of sampling bias.

Non-probalistic sampling techniques are often used in explortory and qualitative research. In this technique, the aim is not to test the hypothesis but rather to develop an initial understanding of a small population.

Types of non-probalistic sampling;

Convenience Sampling. In this type of sampling the researcher includes the individuals who are most accessible to him or her. This is an easy and inexpensive way to gather data as researcher selects the participants that are most easily accessible.

For example you are researching about the school administaration in your college, so after each of your classes you ask students to complete a survey on the topic. This is a convenient way of collecting data as you only surveyed students taking the same classes as you on the same level, the sample is not a represenative of all the students in your college.

Snowball sampling. In this method the researcher locates one or more key informants who are in turn asked to identify other participants who would like to be part of the research. For example you are researching experiences of homeless people in your country. You meet one individual who agrees to participate in the research, who in turn puts you in contact with other landless people in the area.

In non-probalistic sampling, individuals are selected based on non-random criteria, and not every individual has a chance of being included .

This type of sampling is easier and cheaper to access, but has a higher risk of sampling bias.

Types of non-probalistic sampling;

Convenience Sampling. In this type of sampling the researcher includes the individuals who are most accessible to him or her. For example you are researching about the school administaration in your college, so after each of your classes you ask students to complete a survey on the topic. This is a convenient way of collecting data as you only surveyed students taking the same classes as you on the same level, the sample is not a represenative of all the students in your college.

Snowball sampling. In this method the researcher locates one or more key informants who are in turn asked to identify other participants who would like to be part of the research. For example you are researching experiences of homeless people in your country. You meet one individual who agrees to participate in the research, who in turn puts you in contact with other landless people in the area.