As follows:
http://i707.photobucket.com/albums/ww74/stevieg90/12-6.jpg
Statistics 4
2009-11-19 4:03 am
回答 (1)
2009-11-19 4:54 am
✔ 最佳答案
As (11000-10000)/(240/sqrt(144))=50 indicates that the difference between actual sales before and after the training course is greater than 10000. So the answer is A.
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20091118000051KK01246