In case the population of research is heterogeneous in nature which of the following sampling techniques will ensure optimum representativeness of sample units?
Stratified random sampling
When the population is heterogeneous, it is made up of distinct sub-groups (strata) that differ on the characteristic being studied. To make the sample truly representative, every such sub-group must be proportionately reflected in it.
Stratified random sampling first divides the heterogeneous population into homogeneous strata (for example by gender, income, region) and then draws a random sample from each stratum. Because units are chosen from every layer, the internal variation of the population is captured and representativeness is maximised.
Simple random sampling gives every unit an equal chance but, in a strongly heterogeneous population, chance alone may over- or under-represent some sub-groups, so representativeness is not guaranteed. Cluster sampling picks whole ready-made groups (clusters) and studies all units within the selected clusters; it is efficient for scattered populations but each cluster may not mirror the whole, reducing representativeness. Systematic sampling selects every kth unit from a list and can introduce bias if the list has a hidden periodic pattern. Hence, for a heterogeneous population, dividing into strata is the optimum method.
Correct answer: Stratified random sampling
Similar Questions
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: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 :
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 :
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:
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
Which of the following sampling procedures will be appropriate for conducting researches with empirico-inductive paradigm?
Which of the following statements fails to indicate the intent of purposive sampling?
Which one of the following is a non-probability sampling?
'Sampling Cases' means
Important Questions from Sample
Which of the following are correct about Questionnaire?
(a) In open ended question, specific responses are taken through ranking, scaled items and categorical responses.
(b) In ranking, respondent place the response in a rank order according to some criteria.
(c) In scaled item, respondent indicate the strength of their agreement only.
(d) In categorical response, respondent are given only two responses such as 'yes' or 'no'.
Choose the correct option from the codes :
Arrange in sequence the steps involved in the sampling process
A. Choose between probability and nonprobability sampling
B. Specify sampling unit
C. Validate sample
D. Determine the necessary sample size
E.Select appropriate sampling frame
Choose the correct answer from the options given below:
Which one of the following is NOT an essential characteristic of data?
- Which of the example requires snowball sampling technique?
A model being fitted is said to be adequate if the residual plot:
