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홍차넷
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티타임
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- 다양한 주제에 대해 자유롭게 글을 작성하는 게시판입니다.
Warning: Use of undefined constant use_formmail - assumed 'use_formmail' (this will throw an Error in a future version of PHP) in /home/redtea/html/pb/lib.php on line 519
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전체기타일상/생각꿀팁/강좌방송/연예도서/문학영화의료/건강문화/예술경제생활체육과학/기술철학/종교정치요리/음식역사여행육아/가정IT/컴퓨터음악창작게임스포츠사회오프모임
Warning: Use of undefined constant level - assumed 'level' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/setup.php on line 29
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Warning: Use of undefined constant HTTP_HOST - assumed 'HTTP_HOST' (this will throw an Error in a future version of PHP) in /home/redtea/html/pb/memo_replace.php on line 3
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| Date |
Warning: Use of undefined constant reg_date - assumed 'reg_date' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view.php on line 53 18/06/06 01:05:44 Warning: Use of undefined constant mod_date - assumed 'mod_date' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view.php on line 56 |
| Name | 히하홓 |
| File #1 | 1.PNG (116.2 KB), Download : 19 |
| Subject | [진짜 통계의 오류] 설계의 오류 |
 어떤 상황에서 실험, 조사를 하고 있다고 합시다. 변수는 3가지 C, T, K가 있고 Y라는 결과들을 조사할것입니다. 각 변수 C,T,K는 -(마이너스) 이거나 +(플러스)로 설정할수있습니다. 즉 변수마다 2가지의 수준이 존재합니다. 그러므로 총 경우의 수는 2^3=2*2*2=8이 나오겠지요. 그래서 총 8번 조사를 한 결과가 사진 1 가장 윗 사진 에 나와 있습니다. 각변수들을 -,+ 2가지 수준으로 나뉘기 때문에 각 변수들의 효과를 알아보기 위해 8개의 결과에서 C를 마이너스에서 플러스로 바꿨을때, Y의 변화량 4가지= ( 8 나누기 2) T를 마이너스에서 플러스로 바꿧을때, Y의 변화량 4가지= ( 8 나누기 2) K를 마이너스에서 플러스로 바꿨을때, Y의 변화량 4가지= ( 8 나누기 2) 을 정리한것이 사진1의 밑의 3 육각형입니다. 평균적인 각 변수들의 효과를 알아보려면 이 4개의 변화량의 평균값을 구하면 됩니다! 즉 변수 C가 마이너스에서 플러스로 변할때의 효과는 (-6-7-4-3)/4 =-5 가 되는 식이죠. 즉 해석 1: 변수 C가 마이너스에서 플러스로 변하면 y는 5만큼 떨어진다! 라고 해석하면 될것같습니다만.. 이러한 해석은 오류가 있습니다. 바로 이 효과들은 나머지 변수들을 고정시켰을때의 효과입니다! 즉 올바른 해석: 나머지 변수 (T,K)가 변하지않고 고정시켜놓고, C가 마이너스에서 플러스로 바꾸면 Y는 -5만큼 떨어진다! 가 올바른 해석입니다. 왜 그러냐고요? 변수 C와 T, K들은 interaction(교호작용,상호작용)이 있을 수 있기 때문입니다. 쉽게 적으면 T가 플러스일때 T가 마이너스일때에 따라 C의 변화에 따른 Y의 값의 변화량이 바뀔수 있기 때문입니다. (그림1의 우측 하단 그림에서 T가 마이너스일때는 K가 변하면 Y가 -8,-9 변화량이 감소하지만 T가 플러스일때는 Y가 증가함을 볼수있습니다. 이런 경우죠) 해석 1처럼 하고싶다면 다른 변수들의 상태가 어떻게 되든 변수 C의 효과가 항상 같다! 다시 말해 변수 C는 Y에 가법적으로 (additively)하게 영향을 미쳐야한다는 가정하 (사칙연산에서 곱셈은 곱해지는 수에 따라 효과가 바뀌지만 더하기는 뭐에 더하든 더하는 수의 효과는 같죠! ) 에서만 해석 1처럼 해석을 할 수있습니다. 진짜 하고 싶었던 말은 한국 국가 대표에서 탐욕을 부리는 손흥민을 뺀다면 손흥민에 몰린 수비덕에 좋은 활약을 보이던 선수가 부진한 활약을 보일수도 있다는 말을 적고 싶었네요 PS 혹시 여기 Warning: Use of undefined constant no - assumed 'no' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view.php on line 133 Warning: Use of undefined constant no - assumed 'no' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view.php on line 146 Warning: Use of undefined constant vote - assumed 'vote' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view.php on line 161 0 |
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Warning: Use of undefined constant x - assumed 'x' (this will throw an Error in a future version of PHP) in /home/redtea/html/pb/view.php on line 612
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Warning: Use of undefined constant reg_date - assumed 'reg_date' (this will throw an Error in a future version of PHP) in /home/redtea/html/pb/view.php on line 620
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Warning: Use of undefined constant HTTP_HOST - assumed 'HTTP_HOST' (this will throw an Error in a future version of PHP) in /home/redtea/html/pb/view.php on line 640
Warning: Use of undefined constant name - assumed 'name' (this will throw an Error in a future version of PHP) in /home/redtea/html/pb/view.php on line 644
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Warning: Use of undefined constant HTTP_HOST - assumed 'HTTP_HOST' (this will throw an Error in a future version of PHP) in /home/redtea/html/pb/cmt_replace.php on line 3
Warning: Use of undefined constant ismember - assumed 'ismember' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 6
Warning: Use of undefined constant file_name - assumed 'file_name' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 28
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105550 class="iamcmt" style="display:none;"> Warning: Use of undefined constant no - assumed 'no' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 66
105550 class='vcm '>
Warning: Use of undefined constant x - assumed 'x' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 70
Warning: Use of undefined constant x - assumed 'x' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 71
Warning: Use of undefined constant no - assumed 'no' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 76
Warning: Use of undefined constant ismember - assumed 'ismember' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 117
Warning: Use of undefined constant ismember - assumed 'ismember' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 118
Warning: Use of undefined constant ismember - assumed 'ismember' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 119
Warning: Use of undefined constant ismember - assumed 'ismember' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 120
Warning: Use of undefined constant ismember - assumed 'ismember' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 121
105550'> 이울
Warning: Use of undefined constant mod_date - assumed 'mod_date' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 133
Warning: Use of undefined constant no - assumed 'no' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 140
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18/06/06 04:04
105550>삭제 주소복사
Warning: Use of undefined constant level - assumed 'level' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 150
손흥민은 황희찬을 해리케인으로 보이게 하는 최면을 누가 좀 걸어줬으면 좋겠더군요. 어디까지나 서브웨폰으로 써먹을 선수인데 본인이 팀의 주무기인줄 아니
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Warning: Use of undefined constant password - assumed 'password' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 166
Warning: Use of undefined constant vote - assumed 'vote' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 171
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Warning: Use of undefined constant password - assumed 'password' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 166
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Warning: Use of undefined constant vote - assumed 'vote' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 172
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Warning: Use of undefined constant no - assumed 'no' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 173
Warning: Use of undefined constant no - assumed 'no' (this will throw an Error in a future version of PHP) in /home/redtea/html/a_skin/bbsd/view_comment.php on line 173
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