... (2010) , “Sampling and Statistical significance”, Available from: http://nguyendinhhuynh-researchdesign.blogspot.com /2010/ 03/chuong-6-lay-mau-va-y-nghia-thong-ke.html [Accessed 27 October 2010] + ... domestic and international market during period 200 3-2 006Chart 1: Trends of domestic and international market. According to chart 1, we can easily recognize the change and general trends of ... 26>10,00 0-2 0,000 20,000 35>20,00 0-3 0,000 30,000 77>30,00 0-4 0,000 40,000 145>40,00 0-5 0,000 50,000 102>50,00 0-6 0,000 60,000 36>60,00 0-7 0,000 70,000 21>70,00 0-8 0,000...