สำมะโนธุรกิจและอุตสาหกรรม พ.ศ. 2565 อุตสาหกรรมการผลิต: ภาคเหนือ

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 :  =   = Ah i 1 hijklmp hjklmp ) Vˆ ( Xˆ ) Vˆ ( Xˆ 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 : X hjklmp ˆ ) X hjklmp ˆ (Vˆ hjklmp ) Xˆ ( cv    =