รายงานสำรวจธุรกิจทางการค้าและธุรกิจทางการบริการ พ.ศ. 2567

chapter 2 Statistical methodology The 2024 Business Trade and Services Survey The sampling design adopted in this survey is Stratified Systematic Sampling. The sampling units were establishments. Stratification Activities are classified according to the Thailand Standard Industrial Classification of 2009 (TSIC - 2009), which serve as the strata. In total, there are 309 strata. Within each stratum, establishments are further categorized by size, based on the number of employees, into six size groups as follows : (1 - 5 persons , 6 - 15 persons, 16 -30 persons, 31-100 persons, 101-200 persons and > 200 persons). Selection of Sampling Unit The sample selection of establishments were done by systematic sampling and performed separately and independently in each sub- stratum. The total sample was 28,700 from 2,054,098 establishments. T h e t o t a l n u m b e r o f s a m p l e establishments selected for enumeration by region and size. 2.5.1 General information of business establishment 2.5.2 Persons engaged and remuneration. 2.5.3 Expenses of establishment. 2.5.4 Inventory of establishment. 2.5.5 Receipts of establishment. 2.5.6 Fixed assets 2.5. 7 Opinion and recommendations of establishment. 2.4 Sample Design 2.5 Items of data collection 2.6 Data collection Collection method The interviewing method was employed in data collection. T h e e n ume r a t o r s o f t h e Na t i o n a l Stat ist i ca l Office were sent out to interview the owners or the entrepreneurs of the sampled business establishments during 1 April – 31 July 2024. 63