Non probability sampling methods with application, Advantages and Disadvantages

The process of selecting a sample from a population  without using statistical probability theory is called non probability sampling. For example,

Lets say that a university has roughly 10000 students. These 10000 students are our population (N). Each of the 10000 students is known as a unit, but its hardly possible to get known and select every student randomly.Here we can use Non-Random selection of sample to produce a result.

Non-probability sampling-statistical aid

Applications of non-probability sampling

• This type of sampling can be used when demonstrating that a particular trait exist in the population.
• It can also be useful when the researcher has limited budget, time and workforce.

• Select samples purposively
• Enable researchers to reach difficult to identify members of the population.
• Lower cost
• Limited time.