Sampling is a process used in statistical analysis where a predetermined number of observations are taken from a larger population. There are two main sampling methods: probability sampling, which uses random selection, and non-probability sampling, which uses non-random techniques. Probability sampling methods include simple random sampling, systematic sampling, stratified sampling, and cluster sampling. Non-probability sampling includes convenience sampling, quota sampling, judgemental/purposive sampling, and snowball sampling. The advantages of sampling include lower cost, less time consumption, and higher accuracy of data collection, while disadvantages include potential for bias and inability to select truly representative samples.

1. SAMPLING

3. sampling is a process used in statistical analysis in
which a predetermined number of observation are
taken from a larger population.

4. Sampling methods
1. PROBABILITY SAMPLING
2. NON PROBABILITY SAMPLING

5. PROBABILITY SAMPLING METHODS
1. Simple random sampling
In this case each individual is chosen entirely by
chance and each member of the population has an equal
chance ,or probability ,of being selected.

6. 2. Systematic sampling
Individuals are selected at regular intervals from the
sampling frame.
3. Stratified Sampling
In this methods ,the population is first divided into
subgroups ( or strata ) who all share a similar charecteristic.

7. 4 . Cluster sampling
In a cluster sample , subgroups of the population
are used as the sampling , rather than individuals.

8. NON PROBABILITY SAMPLING
1. Convenience sampling
Convenience sampling is perhaps the easiest
method of sampling ,because participants are selected
based on availability and willingness to take part

9. 2. Quota sampling
This method of sampling is offer used by market
researchers interviewers are given a quota of subjects of a
specified type two attempt to recruit

10. 3. Judgemental/ purposive sampling.
In this method a sample purely on the basis and
discretion of the researcher purely on the basis of nature of
study along with his / her understanding of the target
audience .

11. 4. Snowball sampling
In this method is commonly used in Social
Sciences then investigating hard - to - reach groups

12. ADVANTAGES AND DISADVANTAGES
OF SAMPLING
Advantages
• Low cost of sampling.
• Less time consuming.
• Scope of sampling is
high.
• Accuracy of data is
high.
• Organisation of
convenience.
Disadvantages
• Chance of bias.
• Difficulties in selecting a
truely representative
sample.
• Inadequate knowledge in
the subject .
• Changeability of units.
• Impossibility of sampling.

13. REFERENCES
https://www.healthknowledge.org.uk/public-
health-textbook/research-methods/1a-
epidemiology/methods-of-sampling-population
https://www.investopedia.com/terms/s/sampling-
asp