Which one of the following is a non-probability sampling?
Purposive
The dividing line between the two families of sampling is whether every member of the population has a known, non zero probability of being selected. If chance governs the selection it is probability sampling; if the researcher's judgement or convenience governs it, it is non probability sampling.
Purposive sampling is the non probability method here. Also called judgemental sampling, it means the researcher deliberately selects units believed to be most useful for the purpose of the study - typically people with particular expertise, experience or characteristics. Chance plays no part, so no member of the population has a calculable probability of inclusion, and the results cannot be generalised to the population with any measurable confidence. It is nonetheless valuable in qualitative research, in exploratory studies, and where the population of interest is small or hard to reach.
The other three are all probability methods.
Simple random sampling gives every member of the population an equal and independent chance of selection, using a lottery or random numbers. It is the archetype of probability sampling.
Systematic sampling selects every kth unit from a list after a random start. Because the starting point is chosen at random, selection probabilities are known, so it is a probability method; its one caution is that a periodic pattern in the list can bias the sample.
Stratified sampling divides the population into homogeneous strata such as age groups or regions and then draws a random sample within each. Random selection operates inside every stratum, so it remains a probability method, and it improves representation of subgroups.
Other non probability methods, for contrast, include convenience, quota and snowball sampling.
Hence the non-probability sampling method is purposive.
Similar Questions
In online surveys, which of the following are sampling issues ?
A. People in a household may use the same computer, as they have access to only one.
B. Many respondents may have multiple email IDS.
C. Internet users constitute a biased sample of the population
D. Sampling frames for online surveys are cheap.
E. The governments restrict online surveys.Choose the most appropriate answer from the options given below :
In case the population of research is heterogeneous in nature which of the following sampling techniques will ensure optimum representativeness of sample units?
A sample of respondents which is available to researchers because of their access to the respondents is identified as :
Given below are two statements :
Statement I : In probability sampling, it is not necessary that all the members of population have an equal opportunity to be the part of the sample.
Statement II : Non probability sampling method is not a fixed or predefined selection process.
In the light of the above statements, choose the correct answer from the options given below :
Which of the following statements fails to indicate the intent of purposive sampling?
Which of the following sampling procedures will be appropriate for conducting researches with empirico-inductive paradigm?
'Sampling Cases' means
Given below are two statements
Statement I: In survey research, even a large sample cannot guarantee precision.
Statement II: As large samples also do not guarantee precision, the researcher need not worry about sampling error.
In light of the above statements, choose the correct answer from the options given below
Given below are two statements:
Statement I: When selection procedure is biased, taking a large sample will help reduce the bias.
Statement II: In a normally distributed data, the chances of individual observed values deviating more than 3 times the standard deviation from the mean value, are very less.
In the light of the above statements, choose the most appropriate answer from the options given below:If a researcher wants to select a sample from a population such that each member in the population of interest has an equal chance of being selected in the sample, the researcher is following:
Important Questions from Sample
In online surveys, which of the following are sampling issues ?
A. People in a household may use the same computer, as they have access to only one.
B. Many respondents may have multiple email IDS.
C. Internet users constitute a biased sample of the population
D. Sampling frames for online surveys are cheap.
E. The governments restrict online surveys.Choose the most appropriate answer from the options given below :
In case the population of research is heterogeneous in nature which of the following sampling techniques will ensure optimum representativeness of sample units?
A sample of respondents which is available to researchers because of their access to the respondents is identified as :
Given below are two statements :
Statement I : In probability sampling, it is not necessary that all the members of population have an equal opportunity to be the part of the sample.
Statement II : Non probability sampling method is not a fixed or predefined selection process.
In the light of the above statements, choose the correct answer from the options given below :
Given below are two statements:
Statement I: If a population from which a sample is to be drawn does not constitute a homogenous group, stratified sampling technique is generally applied in order to obtain a representative sample.
Statement II: In the case of small samples, z-test is applied even if the population standard deviation is not available (given).
In the light of the above statements, choose the most appropriate answer from the options given below:
