explore · Strategy · 30–60 min · 5-20 people · low energy

Multi-stage Sampling

Multi-stage sampling refines a broad population into targeted groups for surveying, enhancing the precision of data collection. This method is effective for large, diverse populations where direct surveying is impractical.

When to use Multi-stage Sampling

Use this method when you need to survey a large population but lack the resources to reach everyone directly. It's particularly useful for geographically dispersed groups.

What it solves

Difficulty reaching specific subgroups within a large population; Inefficient use of resources when surveying a broad, untargeted group.

How to run Multi-stage Sampling, step by step

  1. Define the overall population of interest. (5 min)
  2. Divide the population into larger clusters based on relevant criteria (e.g., geographic region, organizational department). (10 min)
  3. Subdivide the larger clusters into smaller, more targeted groupings. (15 min)
  4. Select a sample from each of the final, targeted groupings for surveying. (15 min)
  5. Analyze the data collected from each sample group. (15 min)

Materials needed

  • Whiteboard or virtual whiteboard
  • Markers or digital pens
  • List of population characteristics

Facilitator tips

  • Ensure clusters are mutually exclusive to avoid overlap.
  • Clearly define the criteria for each stage of clustering.

Common pitfalls

  • Creating clusters that are too broad or poorly defined, leading to inaccurate sampling. Clearly define cluster criteria.
  • Bias in the selection of samples within each cluster. Use random selection methods within each cluster.

Variations

  • Vary the number of stages depending on the complexity of the population.
  • Use different clustering criteria at each stage to target specific characteristics.

Running it online or hybrid

Use breakout rooms in Zoom to simulate smaller cluster discussions before bringing the whole group back together.

What it produces

A refined sampling frame with clearly defined clusters and sub-clusters.

Origin

Adapted from BetterEvaluation.org — source

Build a session around Multi-stage Sampling

METODIC places Multi-stage Sampling inside a complete, timed session plan — agenda, worksheets, facilitator guide and slides — matched to your group and goal.

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