สำมะโนธุรกิจและอุตสาหกรรม พ.ศ. 2565 อุตสาหกรรมการผลิต: ภาคเหนือ

72 The 2022 Business and Industrial Census ( Manufacturing Industry : Northern region ) 1 . The estimation of total at activity level 1 . 1 The estimated total number of the characteristic X of the establishments for the p th sub - size, m th activity, l th class, k th group, j th division, h th region was based on the formula :  =  =  Ah i 1 hijklmp hjklmp Xˆ Xˆ where Xˆ hijklmp  is the estimated total number of the characteristic X for the p th sub - size, m th activity, l th class, k th group, j th division, i th province, h th region which   =  =  hijklmp n q 1 hijklmpq hijklmp hijklmp x w Xˆ hijklmpq x is the value of the characteristic X for the q th sample establishment, p th sub - size, m th activity, l th class, k th group, j th division, i th province, h th region . hijklmp w  is the weighting factor of the establishments for the p th sub - size, m th activity, l th class, k th group, j th division, i th province, h th region . Where hijklmp hijklmp hijklmp n N w    = hijklmp N  is the total number of the establishments for the p th sub - size, m th activity, l th class, k th group, j th division, i th province, h th region .