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<!DOCTYPE html>
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<h2>Simple Random Sampling (SRS)</h2>
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<h2>Simple Random Sampling (SRS)</h2>
In Simple Random Sampling, every individual in the population has an equal and independent probability of being selected.
<h4>Mathematical Description</h4>
Let:
<ul>
<li>\(N\) = population size</li>
<li>\(n\) = sample size</li>
</ul>
Then the probability that any specific unit is selected is:
<br>
$$
P(\text{selection}) = \frac{n}{N}
$$
<br>
Each possible sample of size \(n\) has equal probability:
<br>
$$
P(\text{any given sample}) = \frac{1}{\binom{N}{n}}
$$
<h4>Example:</h4>
If a class has 100 students and you randomly select 10 students, each student has a probability of 0.1 of being chosen.
<h4>When to Use:</h4>
<ul>
<li>Population is homogeneous</li>
<li>Complete sampling frame is available</li>
<li>Simple and unbiased selection</li>
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