... 10.4 20 Switzerland309.9 21 2.8 7745.9 9 2. 4 21 Germany 28 63 120 2 820 02 7.9 2. 7 22 Poland667.4 21 3.9 38100.7 4.6 4 .2 23Singapore 24 0 21 9.5 4987.6 9 .2 6.5 24 Taiwan738.8 23 6 23 069.345 5.7 3.5 25 India 326 7 ... các biến:*IP:KĐGT : ≠= 0: 0: 21 20 ββHHTa có : 0,4865550-5,537833)( 2 * 22 =−=∧∧βββSet = 11,381 720 )27 ( 025 .0)5 32( 2/ tt=−α =2, 05183=> t > )27 ( 025 ,0t⇒ ... hồi quy : Trang 9GVHD : Nguyễn Quang Cường Tiêu chuẩn kiểm định : t =)(111βββse∗−= 939,34870 - 520 , 026 2-= -0,553 629 )27 ( 025 .0)5 32( 2/ tt=−α =2, 05183Vì 553 629 ,0=t...