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- Topic: About Statistic
Author | Topic: About Statistic |
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littleangel @2007-05-29 06:33:41 |
Hi Everyone! There is only 5 days left! How's you guys study progress? I got some statistic problems right now. Could anybody explain "confident region VS Significant level"? "P-value VS Z-value"? Why sometimes z-value =(observation - population mean) / sd; but sometimes z-value = (mean - population mean) / (sd / squared n)? Thanks u guys! And Good luck to all of you! |