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发表于 1-4-2010 11:23 PM
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http://math2.org/math/integrals/tableof.htm
这个网站提供了integration and differentiation for trigonometric functions, inverse trigonometric functions, hyperbolic functions and inverse hyperbolic functions..
我的笔记有些漏掉了。。。所以请你自己漏掉的抄下来。。 |
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楼主 |
发表于 2-4-2010 01:14 PM
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回复 39# 數學神童
I got 172/81 but the answer is 361/81 |
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发表于 2-4-2010 01:27 PM
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回复 數學神童
I got 172/81 but the answer is 361/81
whyyie 发表于 2-4-2010 01:14 PM 
答案错了。。。。 |
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发表于 3-4-2010 09:45 PM
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发表于 3-4-2010 10:54 PM
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发表于 4-4-2010 11:04 PM
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when do we use t-distribution and central limit theorem in finding confidence interval? |
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发表于 5-4-2010 04:04 PM
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本帖最后由 walrein_lim88 于 5-4-2010 04:09 PM 编辑
when do we use t-distribution and central limit theorem in finding confidence interval?
數學神童 发表于 4-4-2010 11:04 PM 
T-distribution is used only for a small sample drawn from a normal population with unknown population variance.
(small sample , n < 30)
Whereas:
Central limit theorem apply for:
1. A large sample ( n = 30 and above) drawn from any type of distribution of population.(whether its population variance is unknown or known)
2. A sample (any size) drawn from a normal population with known population variance only
(对比起，没用中文）
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发表于 5-4-2010 09:02 PM
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when do i need to use continuity correction?just for normal approximation and sampling proportion only? |
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发表于 5-4-2010 09:53 PM
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when do i need to use continuity correction?just for normal approximation and sampling proportion on ...
數學神童 发表于 5-4-2010 09:02 PM 
yes...just for normal approximation and sampling proportion only...(对不起，没用中文） |
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