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2 Questions

1) is there any webpages that i can learn the concepts of statistics(arithmetic mean, deriance...) and probability...

2) does anyone have the exercises' answers of GMAT Xingdongfang Jiangyi?

many thanks in advance!!
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我知道gre有“gre数学无忧“笔记,其中包括了统计,方差
www.taisha.org
www.manfen.net
应该有下载

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我找不到???

为什麽我找不到呀??
有关于概率喝统计数学的网址吗??
讲义上的攻势窝看不懂.

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if you have official guide, read Math Review in which section A talks about descriptive statistics and Discrete probability.
\"Our lives are a combination of good and bad, positive and negative.When we focus on the good that is already present, we feel better. If not, we don\'t. Either way, life goes on.\" -- Peter McWilliams

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