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Table 12 Sample size for each stratum and the respective number of member retrieved

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

Strata Name #Distinct Members Recruited Sample Size Actual Sample Size CI for CL = 95 %
E1 Agility 114,827 1,031 57 12.98
E2 Project Management 5,488 874 40 15.44
E3 Agile Practices1 11,633 955 56 13.06
E4 Agile Practices 2 3,864 820 35 16.49
E5 Software Testing 1 56,400 1,021 26 19.22
E6 Software Testing 2 5,791 882 22 20.86
E7 Configuration Management 17,234 981 23 20.88
E8 SW Architecture 7,335 911 31 17.57