Calculate the perfect sample size for your survey through our formula
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Determining the size of your sample population is one of the most difficult decisions to make in your survey. A larger sample can yield more accurate results — but the more responses you collect, the more expensive it gets.
Use our easy sample size formula to figure out the perfect sample size for your survey.
A clear research question, outcomes, and indicators are the best base for an effective survey.
Learn when you should use observations, questionnaires, interviews, and focus group discussions.
Master when and how to best use qualitative vs. quantitative research questions.
Which questions should you ask and, more importantly, which questions you should avoid?
A good survey question asked in the wrong way will just confuse your results.
Other tips and tools to help with writing clear, objective questions.
Write “Mutually Exclusive, Collectively Exhaustive” questions to ensure you get good data.
How do closed-ended questions differ from open-ended questions, and when is each most effective?
How to make sure that your sampling error does not invalidate the results of your survey.
This is a superb data collection guide. It helped me understand how to deal with large and unknown population sizes, a typical problem faced by a lot of my colleagues. This book is a must have for all researchers.
This course is super helpful for our field staff to understand why they collect data, and how they can collect the right information they need.
This guide on data collection is fantastic! It is crisp, easy to consume, and extremely helpful for anyone who collects data in the field.