Module 5
Sampling (sample size and sampling technique) and quantitative data collection
Training course in research methodology, research protocol development and scientific writing 2024
October 2, 2024 - Geneva
A. Required readings
Sampling (sample size estimation and sampling technique)
- Go over the presentation: Sampling and sample size estimation - Moazzam Ali (WHO).
- Go over the presentation: How to determine the correct sample size of a research - Aseel Mugahed.
- Watch the video: Sampling: Simple Random, Convenience, systematic, cluster, stratified - Statistics Help (Dr Nic's Maths and Stats, 2012, 4:54 mins)
- Study sections 4.6 ‘Study sample’ and 4.7 ‘Sample size’ on pages 50 to 54 of the document: Fathalla MF, Fathalla MM. A practical guide for health researchers (WHO Regional Publications, Eastern Mediterranean. Series 30). WHO; 2004.
Quantitative data collection
- Go over the presentation: Quantitative data collection: Designing a questionnaire - Khalifa Elmusharaf (University of Limerick, Ireland).
- Study sections 4.8 ‘Measurement’ (pages 54 to 55) and 4.10 ‘A note on questionnaire design’ (pages 57 to 58) of the document: Fathalla MF, Fathalla MM. A practical guide for health researchers (WHO Regional Publications, Eastern Mediterranean. Series 30). WHO; 2004.
B. Assignment
Complete and submit the short paperwork assignment.
Relevant online resources
Tools for sample size estimation
- ClinCalc LLC. Sample Size Calculator
- Epi Info™. Centers for Disease Control and Prevention (CDC) (See also Epi Info™ 7 Tutorial Videos)
- OpenEpi.com
- StatCalc
- STEPS Sample Size Calculator and Sampling Spreadsheet
Useful videos
- Epi Info™ 7 Tutorial Videos
- Sampling error and variation in statistics and data science (Dr Nic's Maths and Stats, 2014)
- Type 1 and Type 2 errors - Statistics Help (Dr Nic's Maths and Stats, 2019)
- Designing a Questionnaire or Survey - statistics help (Dr Nic's Maths and Stats, 2014)
- Writing Good Survey Questions - Statistics Help (Dr Nic's Maths and Stats, 2019)
- Types of Data: Nominal, Ordinal, Interval/Ratio - Statistics Help (Dr Nic's Maths and Stats, 2011)
- 11 Sampling methods (NPTEL-NOC IITM, 2019)
- 12 Calculating sample size and power (NPTEL-NOC IITM, 2019)
- 15 Designing data collection tools (NPTEL-NOC IITM, 2019)
Reference document