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Table 14 Confidence Intervals of the samples from each amalgamated group

From: Investigating probabilistic sampling approaches for large-scale surveys in software engineering

Skill group Population size Sample size CI for CL=95 %
Agilists 120,315 97  9.95
Testing Professionals  68,033 82 10.82
Programmers  9,655 57 12.94
Configuration Managers  17,234 23 20.42
System Analysts  7,335 31 17.57