สำมะโนธุรกิจและอุตสาหกรรม พ.ศ. 2565 อุตสาหกรรมการผลิต: ภาคตะวันออกเฉียงเหนือ

71 Appendix B: Estimation of Sampling Error The survey results were presented at regional level namely Bangkok metropolis, Vicinity of Bangkok metropolis (Samut Prakan, Nonthaburi, Pathum Thani, Nakhon Pathom and Samut Sakhon), the Central (excepted Bangkok metropolis and Vicinity of Bangkok metropolis), the North, the Northeast and the South classified by TSIC 2009 at activity level. The sizes of establishment were aggregated from 12 sub-sizes of establishment according to number of persons engaged as follows: Size of establishment 1 2 3 4 5 6 7 8 Number of persons engaged 1-5 6-10 11-15 16-25 26-30 31-50 51-200 > 200 Let, q = 1 , 2 , 3 , ... , hijklmp n  (sample establishment) p = 1 , 2 , 3 , ... , 12 (sub-size of establishment) m = 1 , 2 , 3 , ... , 409 (activity) l = 1 , 2 , 3 , ... , 164 (class) k = 1 , 2 , 3 , ... , 78 (group) j = 1 , 2 , 3 , ... , 28 (division) i = 1 , 2 , 3 , ... , h A (province) h = 1 , 2 , 3 , 4 , 5 , 6 (region) Appendix B: ESTIMATION OF SAMPLING ERROR