Скачать или смотреть Snow Ball Sampling | Bubble Sampling | Advantages and Disadvantages | Types of Snow Ball Sampling.

Snowball sampling is a non-probability sampling technique where existing study subjects recruit future subjects from their acquaintances. This method is particularly useful for studying hard-to-reach populations, such as marginalized groups, people with rare diseases, or illicit activities.

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Types of Snowball Sampling

1. Linear Snowball Sampling:

Each participant refers only one person, forming a linear chain.

2. Exponential Snowball Sampling:

Each participant refers multiple people, leading to exponential growth.

3. Targeted Snowball Sampling:

The researcher sets specific criteria for referrals, controlling sample characteristics.

Advantages

✓ Access to Hidden Populations
✓ Trust-Based Recruitment
✓ Cost-Effective and Efficient
✓ Time Saving Cost Saving

Disadvantages

X Selection Bias:
X Lack of Generalizability
X Dependence on Social Networks

When to Use Snowball Sampling

When studying hard-to-reach or hidden populations.

When a sampling frame is unavailable.

When qualitative insights are more valuable than random sampling.

In this chapter we discuss in detail...

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#optimumallocation #equalallocation #naymanallocation #centrallimittheorem #chebyshevinequalities #samplongdistributionofmeans #samplingdistributionofproportion #randomnumbers #samplingdistributionofvariances

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