Sampling & Sample Size: Refresher

The one-page sampling reference you'll actually keep open: designs, what drives sample size, and the pitfalls.

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Why this matters

Sampling decisions get made in a hurry and haunt the whole study. This one-pager keeps the essentials at your fingertips.

Probability vs non-probability, the common designs, what actually drives sample size, rules of thumb, and the usual mistakes.

What it changes

What's inside

Branded one-page PDF reference
Designs, sample-size drivers, rules of thumb
Disaggregation reminder
Print it or keep it on your desktop

Sample

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ImpactMojo

Sampling & Sample Size: Refresher

Probability vs non-probability

➤ when each generalises

What drives sample size

➤ effect, power, variance

Rules of thumb

➤ n≈384 for ±5% at 95%

Pitfalls

➤ frame ≠ population

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