รายงานสำรวจธุรกิจทางการค้าและธุรกิจทางการบริการ พ.ศ. 2567

THE 2024 BUSINESS TRADE AND SERVICES SURVEY Estimation method The survey results were presented at the national level. All the establishments were classified by economic activity according to the Thailand Standard Industrial Classification of 2009 (TSIC-2009), at activity level and divided into sizes according to number of persons engaged. Let, l = 1 , 2 , 3 , ... , (sample establishment) k = 1 , 2 , 3 , ... , 6 (size of establishment) j = 1 , 2 , 3 , ... , 309 (activity) 1. The estimation total number The estimation total number of characteristics X of the establishments for the k size, j activity was based on the formula: � = ∑ =1 where is the value of characteristics X of the establishments for the l establishment, k size, j activity. is the weighting factor of the establishment for the k size, j activity. Where = is the total number of the establishments for the k size, j activity. is the total number of the sample establishments for the k size, j activity. 111