Global Advertising 5강 - Global advertising business (Part1)

Global Advertising 6강 - Global advertising business (Part2)

Global Advertising 16강 - How to run global ads (Part1)

Global Advertising 17강 - How to run global ads (Part2)

교육통계및연습 5강 - 변산도 계속(variability)

교육통계및연습 6강 - 정상분포(normal distribution)