สำมะโนธุรกิจและอุตสาหกรรม พ.ศ. 2565 อุตสาหกรรมการผลิต: ภาคตะวันออกเฉียงเหนือ

77 Appendix B: Estimation of Sampling Error 5. The estimation of variance of estimated total The estimated variance of the estimated total number of the characteristic X of the establishments with 1-10 persons engaged ( p =1,2 ) , m th activity, l th class, k th group, j th division, i th province, h th region was based on the formula:  =   = hA i 1 hijklmp hjklmp ) Xˆ (Vˆ ) Xˆ (Vˆ where ) Xˆ (Vˆ hijklmp  is The estimated variance of the estimated total number of the characteristic X of the establishments for p th sub- size, m th activity, l th class, k th group, j th division, i th province, h th region where hijklmp 2 hijklmp hijklmp hijklmp hijklmp hijklmp n s ) n ( N N ) Xˆ (Vˆ   −   =  and                           −  − =  =  =  hijklmp 2 hijklmp n q 1 hijklmpq hijklmp n q 1 2 hijklmpq hijklmp 2 hijklmp n x x 1 n 1 s 6. The estimation of coefficient of estimated variation of estimated total The estimated coefficient of estimated variance of estimated total number of the characteristic X of the establishments with 1 – 10 persons engaged for p th sub- size, m th activity, l th class, k th group, j th division, h th region was based on the formula: hjklmp X ˆ ) hjklmp X Vˆ ( ˆ hjklmp ) Xˆ ( cv    =