N********a 发帖数: 248 | 1 I want to do propensity score analysis. I have already fit a logistic
regression and got the predicted probability as propensity score. But how to
stratify these data according to the propensity score in R? If I want to
get 5 strata, what function should I use?
Thanks. |
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a****y 发帖数: 91 | 2 I am trying to understand the sampling from the following description. Does
anyone know how they get the sample stratum sizes: 10,5,10,4,6. Thanks a lot!
Generates artificial data (a 235X3 matrix with 3 columns: state, region,
income).
# The variable "state" has 2 categories (nc and sc).
# The variable "region" has 3 categories (1, 2 and 3).
# The sampling frame is stratified by region within state.
data=rbind(matrix(rep("nc",165),165,1,byrow=TRUE),matrix(rep("sc",70),70,1,
byrow=TRUE))
data=cbi... 阅读全帖 |
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s********r 发帖数: 297 | 3 大家好,我想请教大家一道题,所以希望各位能帮忙指点,先谢谢大家了!
老板让我做一个A/B testing, 但是没有control group和test group。现在只有 pre-
test population group 和 post-test population group。因为只有一小部分人被
test, 所以打算用 post-test population group作为test group, 然后pre-test
population group作为control group
为了确保 comparing apples with apples, 老板让我trim pre-test population
group by different attributes/dimensions 比如 income level, age group,
activity engagement 都和 post-test population group 类似。
最终要确保trimmed pre-test group 在各个attribute 比如 income level, age
g... 阅读全帖 |
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j**y 发帖数: 462 | 4 2010[2]
Audi (Volkswagen Group) 2.0 L Inline-four engine EA888 DOHC
Turbocharged Fuel Stratified Injection Valvelift
Audi (Volkswagen Group) 3.0 L V6 engine V6 DOHC Supercharged Fuel
Stratified Injection
BMW 3.0 L Straight-six engine BMW M57 DOHC Twin-turbocharged diesel
Chrysler Group LLC 3.6 L V6 engine Pentastar V6 DOHC VVT naturally
aspirated
Ford 2.5 L Inline-four engine Duratec 25 DOHC Hybrid
Ford 3.5 L V6 engine EcoBoost V6 DOHC Twin-t... 阅读全帖 |
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w********o 发帖数: 1621 | 5 楼主,其实你的思路是对的。当你要adjust for 一个变量来考量另一个变量的时候,
就是要做stratified analysis。你现在用permutation也好,bootstrapping也好,就
是采样的时候应该stratified地去取。跟你说的变化为categorical去采样是一个意思
。但就要注意一点,就是各个strata里的test statistic最后要合起来,才是一个
stratified analysis,否则就是在strata里的各自的modeling,不会adjust for
correlation between strata。至于如何合起来,建议你搜一下stratified wilcoxon
test。 |
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g******2 发帖数: 234 | 6 It's the stratified sampling in variance reduction. If a function is
homogeneous across all region, then there's not need to do stratified
sampling. If a function is heterogeneous across regions but homogeneous
within sub-regions, you'll gain efficiency by stratified sampling.
For example, if you have 2 regions and each has 5000 machines. Suppose the
defective% for region 1 is 0.1 and 0.3 for region 2. Then in this case
sampling n samples equally from region 1 and region 2 will be more efficient... 阅读全帖 |
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c*******o 发帖数: 8869 | 7 【 以下文字转载自 USANews 讨论区 】
发信人: comeandgo (春困秋乏夏打盹), 信区: USANews
标 题: 从立法和行政制衡的角度看加州极左州长否决细分亚裔法案
发信站: BBS 未名空间站 (Tue Jun 21 14:45:52 2016, 美东)
最近加州众院通过了臭名昭著的“细分” 亚裔法案,要在亚裔这个大类别之下,进一
步在“other asian”之下划分出比东亚中日韩穷的越南,老挝,斯里兰卡,孟加拉,
苗人等群族。反对者认为此举会让包括华人在AA方面近一步受到挤压。
这个法案据称是“for data collection only”,得到了几乎所有的加州亚裔州议员的
赞成。令人吃惊的是,这个得到加州民主党一致赞成的法案,在去年就通过了,却被州
长jerry brown给否决了。要知道这个brown就是在民主党内也是出名的极左,签署了给
非法移民颁发驾照的法案。那么为什么极左州长会否决极左议会的法案呢?
先看一看细分法案支持者的立场。长期以来亚裔是公认的“模范”少数民族,比如收入
中位数高,50%有本科学位。但这只是一个表象,在亚裔这个大罩子之下... 阅读全帖 |
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c*******o 发帖数: 8869 | 8 最近加州众院通过了臭名昭著的“细分” 亚裔法案,要在亚裔这个大类别之下,进一
步在“other asian”之下划分出比东亚中日韩穷的越南,老挝,斯里兰卡,孟加拉,
苗人等群族。反对者认为此举会让包括华人在AA方面近一步受到挤压。
这个法案据称是“for data collection only”,得到了几乎所有的加州亚裔州议员的
赞成。令人吃惊的是,这个得到加州民主党一致赞成的法案,在去年就通过了,却被州
长jerry brown给否决了。要知道这个brown就是在民主党内也是出名的极左,签署了给
非法移民颁发驾照的法案。那么为什么极左州长会否决极左议会的法案呢?
先看一看细分法案支持者的立场。长期以来亚裔是公认的“模范”少数民族,比如收入
中位数高,50%有本科学位。但这只是一个表象,在亚裔这个大罩子之下还有很多混得
不行的亚裔群族,比如老挝和苗人40%连高中都没毕业,是华人的两倍。亚裔的老人
贫困率也是白人的两倍(这个可能有水分)。这样的群族如果去要政府和私人基金的资
助,很可能碰钉子,因为人家只有你亚裔是模范的stereotype。 在过去5年,亚裔贫困
率增长了40%,太平洋... 阅读全帖 |
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发帖数: 1 | 9 樓主賣了半天的關仔, 好像stratified sampling是甚麼很神秘的東西, 何必呢? 有話
直說不是很好?
美國有三億人口, 還是四億, 為了達到 3% 的誤差, 可能要打電話給三千人. 但是這數
目太大, pollster 不容易做到, 所以統計學說, 可以把這三四億人口 homogeneously
地分成幾塊(稱作 strata), 例如分成一百塊, 每塊人口是三四百萬. 這樣子,只要在選
定的一塊中隨機抽樣三十人, 就可以達到 3% 的誤差. 這樣的民調比較容易做到.
注意關鍵詞是 homogeneous. 意思是說, 每一塊里的人口組成在各方面都一樣, 性別,
黨派, 收入, 年齡....等等. 所以分 strata 不是那麼容易, 你不能隨便拿一個電話區
域號碼代表權美國, 肯定有錯.
樓主一直賣關子, 不肯/不敢明說, 但我猜他的意思是說 CNN 在分 strat 的時候就動
了手腳, 裡面的人群不是同質性的.
這一樓裡面幾個插科打渾的角色如 fishingarden 上了一堆帖子, 但完全講不出內容,
就是罵街, 另外還有幾個如 huhu 根本就是近來罵街的. ... 阅读全帖 |
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c*******o 发帖数: 8869 | 10 就事论事就好了,不要扯什么种族歧视,亚裔自己歧视自己?能联系到纳粹毒气室也是
醉了。
我把布朗反对细分的意见copy过来你看看,那才是老成谋国的态度:
“I think he really believes that minorities of all types are represented
better when they’re not stratified,” O’Connor said. “Asians have more
clout in Sacramento when they act as a caucus.”
“I am wary of the ever growing desire to stratify,” the governor wrote in
a letter to the California State Assembly on Wednesday, Oct. 21. “Dividing
people into ethnic or other subcategories may yield more information, but
not necess... 阅读全帖 |
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E*********o 发帖数: 5965 | 11 转一个:
铸铁发动机,我也说两句 (日本车托看完后闭嘴吧,别老拿全铝发动机说事)
实在看不下去了,一群开着日车的小样如此得瑟。。。。
以下是我在wikipedia.com上原文粘贴下来的,关于EA888发动机的技术参数。
EA888
160 hp (119 kW) - 170 hp (127 kW) 1.8 TFSI I4
Configuration
1798 cc water cooled inline 4, bore 82.5 mm/stroke 84.1 mm
Head
9.6:1 compression ratio, toothed chain driven camshaft, continuous adjusting
intake
Block
88 mm cylinder spacing, 33 kg grey cast iron (GJL 250) <----------看见了吗?
33千克灰铸铁 (GJL 250)
Crankcase
two toothed chain driven counter-rotating balancing shafts suppressin... 阅读全帖 |
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p******g 发帖数: 94 | 12 title:Stability of stratified Rivlin-Ericksen (Model) fluid in magnetized
quantum plasma saturating a porous medium
abstract:The present investigation is to focus on the quantum effects on the
Rayleigh –Taylor instability in an infinitely electrically conducting
inhomogeneous stratified incompressible, viscoelastic fluid/plasma through a
porous medium in the presence of a vertical magnetic field
International Journal of Astrophysics and Space Science
站内信
facebook |
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i****e 发帖数: 46 | 13 基本同意你的观点。略加展开。
他的观点是三等舱,男性乘客多,死的男性比例高才导致整体男性死者比例高。既然对
方用了统计术语,那么就用统计学的方法来解决这个争论。
就这个数据。要做stratify analysis. stratify on gender. colunm varible:舱位,
row variable:death 然后在各自的strata比较survival rate和趋势,看significant
与否,等等才能下定论。
总之,要提供具体数据,否则都是扯谈。 |
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发帖数: 1 | 14 I ask for paper, due to unavailability of downloading in our hospital.
J Heart Lung Transplant. 2016 May 6. pii: S1053-2498(16)30110-3. doi: 10.
1016/j.healun.2016.04.007. [Epub ahead of print]
The effect of timing and graft dysfunction on survival and cardiac allograft
vasculopathy in antibody-mediated rejection.
Clerkin KJ1, Restaino SW1, Zorn E2, Vasilescu ER3, Marboe CC3, Mancini DM4.
Author information
Abstract
BACKGROUND:
Antibody-mediated rejection (AMR) has been associated with increased... 阅读全帖 |
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s*******9 发帖数: 35 | 15 Sorry I cannot input chinese.
mediators are those factors lining on the casual pathway through which your
exposure, a drug for example, affects your outcome, mortality for example.
moderators: when you stratify your study sample by a moderator, gender for
example, you will get different estimated effects in each strata (males/
females). For example, a drug is more effective for males than for females.
Without stratification you will not find out such a difference.
confounders:when you stratify y |
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j*****e 发帖数: 182 | 16 It seems like superray used the wrong terminology in his question. There is
no randomized sample. However, there is random sample, which most stat
analysis developed for.
It is hard to collect a random sample, since the population is not naturally
stratified by age here.
Assume they collected their original sample randomly,
you can view what they did as a two-stage sample. In stage one, you take a
random sample from the population. In stage two, you stratify stage one
sample by age and either ta |
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s**f 发帖数: 365 | 17 请教一个survey weight的问题啊,谢谢!
我现在有个数据,是survey了一个州(stratify成北,中,南区域)的牙医(stratify
成了普通和儿童牙医)。所以总共是6个strata,请问weight是不是着样计算:
总共 完成 weight
1(北 普通) A a A/a
2(中 普通) B b B/b
3(南 普通) C c C/c
4(北 儿童) D d D/d
5(中 儿童) E e E/e
6(南 儿童) F f F/f
这个weight是不是直接可以在SAS里面用?比如:
Proc surveyfreq data=...;
strata XXX;
weight XXX;
有人要我把weight弄成总和是1。假设总共有N个人,sample了n个。那是不是(weight
/N)* n?
不知道为什么要弄成总和是1?谢谢!! |
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n********e 发帖数: 1630 | 18 我是新手在练习ML的东西。我用的是400个data point小的dataset做 classification
(0 or 1),python,sklearn
由于dataset unbalanced, 我用了stratified shuffle split 在grid search CV
training, 找到最优的estimator (scoring = f1)
之后我用几个不同的algorithm 最优的estimator clf 去 evaluate performance的时
候,应该用什么样的strategy?
1. 我用了整个dataset,只用一次,求prediction,然后比较得出accuracy,
precision,recall。这样score很高,高达0.9 以上
2. 我也是用stratified shuffle split 去create 1000 folds, 每个fold train,然
后test, 把accuracy,precision,recall 结果average。这样的话结果很低,只有0.
3-0.6
哪个可以作为evlauate的sc... 阅读全帖 |
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c**i 发帖数: 6973 | 19 supports archaeology, that a single-origin domestication 8 to 9,000 years
years ago at Yangtze Valley (of China) and spread to India, rather than the
competing proposition that Ganges in India independently accomplished the
feat.
研究显示:中国是驯化水稻的原产地. VOA Chinese, May 3, 2011.
http://www.voanews.com/chinese/news
/international/20110503-RICE-ORIGIN-121155584.html
, which cites
Molina J et al, . Proceeding of National Academy Science (PNAS), published
online before print May 2, 2011, doi: 10.1073/pna... 阅读全帖 |
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K*****2 发帖数: 9308 | 20 貌似密克罗尼西亚那几个岛都有等级制度,wiki的说法是相当普遍:
By the time of the island's first contact with European travellers in 1824,
Kosrae had a highly stratified society, typical of the surrounding islands
of the time. Its cultural features included matrilineal lineage and clans,
with a feudal structure of "nobles" controlling land worked by "commoners"
and settlements consisting of small groups of close relatives sharing a
single cook house.
这个Kosrae是密克罗尼西亚最东边的岛,雅浦是最西边,谨慎推断可能中间那些岛全都
是这样。尤其是波纳佩,能搞出南马特尔建筑的,肯定是个阶级社会。 |
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w****1 发帖数: 2887 | 21 http://www.guardian.co.uk/commentisfree/2010/oct/08/liu-xiaobo-china
刘晓波赢了,改革输了
Liu Xiaobo wins Nobel, reform loses
China has many unsung heroes pushing for democracy. Their task gets harder w
hen the west rewards high-profile dissidents
o Nick Young
o guardian.co.uk, Friday 8 October 2010 20.30 BST
o Article history
Pro-democracy activists hold pictures of Chinese dissident Liu Xiaobo Pro-de
mocracy activists hold pictures of Chinese dissident Liu Xiaobo. Photograp... 阅读全帖 |
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o******d 发帖数: 743 | 22 英国卫报, FYI
http://www.guardian.co.uk/commentisfree/2010/oct/08/liu-xiaobo-china
Liu Xiaobo wins Nobel, reform loses
China has many unsung heroes pushing for democracy. Their task gets harder
when the west rewards high-profile dissidents
* Nick Young
Liu Xiaobo, the jailed Chinese pro-democracy activist who has just been
awarded a Nobel peace prize, is certainly a brave man, and his imprisonment
is deplorable. But it is hard to see what contribution he has made to peace,
in China or beyond, or how... 阅读全帖 |
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w********l 发帖数: 11447 | 23 you should adjust for sex and age, or better perform a stratified analysis.
i am pretty sure kayi will be on the top percentage. |
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m******e 发帖数: 2515 | 24 [美国]美国梦衰落:你的父母是谁在今天的美国更重要
作者:inews 来源:移民新闻 发文时间: 2012年02月02日 22:13:53
编者按:在美国,不断扩大的收入差距已经引起了广泛争议,自由派对中产阶级数量的
减少表示谴责,而保守派则认为,一个健康的市场经济必须对艰苦的努力、事业心和冒
险给予报偿。但是,在经济流动性(economic mobility)这一问题上,也就是在个人
在提升自己收入的能力上,大多数人则都赞同:社会具有向上流动性是好事。
的确,保守派经常将经济流动性作为无需为收入不平衡的扩大感到担心的理由。只要人
们有能力上升,那么有人非常富有,其他人处于底层是无关紧要的:经济流动性意味着
人们不会被苑囿于人生的起点。
但是,越来越多的证据表明,在美国,经济流动性并不像很多人想象的那样可实现。此
外,各种研究也表明,经济流动性会随着收入差距的扩大而降低,这预示着,在未来,
人们要想从贫穷向中产阶级移动,或者从中产阶级向顶层移动,会变得更加艰难。
一个名为“经济流动性项目”(The Economic Mobility Project)的研究总结说:“
最近的研究... 阅读全帖 |
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l***i 发帖数: 2542 | 25 http://www.washingtonpost.com/blogs/wonkblog/wp/2014/05/05/hard
A study published this week in the Proceedings of the National Academy of
Sciences finds that hard work is the reason why Asian-American students do
better in school than their white peers.
But the authors of the study also found that, by some measures, Asian youth
may not be as happy. Asians in surveys were less likely to agree with the
statement "I feel good about myself," and they reported spending less time
with friends and feel... 阅读全帖 |
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b********n 发帖数: 38600 | 26 Banana republic is a political science term for a politically unstable
country, whose economy is largely dependent on exporting a limited-resource
product, e.g. bananas. It typically has stratified social classes, including
a large, impoverished working class and a ruling plutocracy of business,
political, and military elites.[1] This politico-economic oligarchy controls
the primary-sector productions to exploit the country's economy. |
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s****b 发帖数: 2039 | 27 知道了。虽然我还不是完全明白整个用途,但是我觉得既然目的是尽可能均匀遍历空间
,为啥干脆不用随机数组,直接用在空间里平均预定的数值就行了么,然后各维变量的权
重排列组合一下。边界条件需要着重分析的,就在边界附近多取几个数值。就是基本上
接近统计中的stratified+systematic sampling的方式。 |
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T********N 发帖数: 2680 | 28 这没有什么主动被动的,人类社会的本质规律就是排斥性的,顺昌逆亡。
所有被排斥的都是被排斥。 无所谓个体主动或者被动,个体本来就无选择权。除非个
体自绝于人民自杀了,否则你就是隐居到大兴养羊去,你的高干爹都得按时给你寄小米
儿。这扯远了。
我发现咱俩谈得不是一回事儿。
给你个异化的定义吧Entfremdung, Karl Marx's theory of alienation describes
the estrangement (Ger. Entfremdung) of people from aspects of their
Gattungswesen ("species-essence") as a consequence of living in a society of
stratified social classes. The alienation from the self is a consequence of
being a mechanistic part of a social class, the condition of which
estranges a p... 阅读全帖 |
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b*********3 发帖数: 1709 | 29 Black and the White 2 1⁄2- to 6-year-old children in the U.S.
standardization
sample of the Differential Aptitude Scale have a 1 standard deviation mean
difference (Lynn, 1996). The size of the average Black–White difference
does not
change significantly over the developmental period from 3 years of age and
beyond (see Jensen, 1974, 1998b)." (Rushton & Jensen, 2005, pp. 240-241.)
Farkas & Beron (2004) reported that blacks score 17.2 points below whites on
the
PPVT in this dataset at age 36... 阅读全帖 |
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发帖数: 1 | 30 heavily stratified in exam performance? |
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s*********r 发帖数: 9493 | 31 sampling的基本目的是确保样本最大限度代表总体,并不要求每个state都抽中同样数
量的样本。
当然,如果你,作为研究者,坚持每个州甚至每个county都要抽中至少一个样本,也不
是不可以做到,搞个分层抽样(stratified sampling)就可以了。
但你的调研设计和调研目的就不一样了。 |
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m****r 发帖数: 237 | 32 听说过stratified sampling么?你以为poll是random sample啊? |
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g********2 发帖数: 6571 | 33 likeke 连“stratified sampling”都没听说过,也敢来评价民调,真是无知者无畏! |
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g********2 发帖数: 6571 | 34 这个随鸡抽样的likeke又上来卖傻了,自己连stratified sampling都没听说过,还敢
说川粉都是non-college graduates。
中国大陆来美国念书的,大多数人都修过一两门统计课。
这个likeke确定读过大学? |
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l****e 发帖数: 609 | 35 首先呢,骂人不会让人觉得你有理,反而会显得你理亏。
我还真不懂stratified sampling,请你别卖嘴皮子。我觉得方舟子说得很在理,请你
试着给大家说说为什么polling公司是结果是错的。
总统辩论谁赢了?
·方舟子·
今年是美国大选年,将在11月8日投票选出新一届总统。按惯例两个主要政
党的总统候选人要举行三场辩论。今年的第一场辩论在9月26日举行之后,几乎
所有美国媒体请的裁判、评论员都一致认为民主党候选人希拉里大胜共和党候选
人川普。但是辩论的胜负判断本来就是很主观的,即使媒体一致认为希拉里获胜
也不会让川粉(川普的狂热支持者)接受,因为他们本来就认为美国主流媒体基
本上都是自由派,都是支持希拉里的。举行辩论的主要目的是要影响选民,那么,
我们可以给胜负定一个客观标准,那就是认为哪一方获胜的选民人数比较多,这
一方就获胜了。第一场辩论刚刚结束,CNN就立即报道了他们通过一家民意调查
机构ORC对521名选民做民意调查的结果,62%认为希拉里赢,27%认为川普赢,据
此可以说... 阅读全帖 |
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g********2 发帖数: 6571 | 36 你连stratified sampling都不懂,你觉得方舟子有道理有什么用?
你根本就不具备辩论的基础,也看不懂人家的反驳,谁陪你玩?
先下去学点抽样的基本知识再来发言吧,别总是丢人现眼。 |
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g********2 发帖数: 6571 | 37 这说明你只听得懂wrong wrong wrong,其他的都听不懂。
就像民调这个问题一样,你不懂stratified sampling,只看见主流媒体的民调结果,
以为就是拿起电话一打,就打出了这个结果,所以你非常相信。
你今天听了个random-digit dialling("dialling"这个词是从你给的CNN链接拷贝来的
,可见CNN的英语也是体育老师教的),但你还是不懂这是什么意思。
前面有位叫“minner”的网友已经详细给你解答了,不知道你是看不懂,还是根本不看。 |
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l****e 发帖数: 609 | 38 自己读读英文吧,Simple random sampling也是一种Probability Sampling Methods,
我不是搞这行的,没有发言权,但我相信方舟子比你和这里绝大多数川粉强,人家说得
有理有据。
说了这么久,我怎么听不出你的高明之处,你能否把一个复杂的问题简单化了讲?你既
然单挑我,说随机抽查不科学,你总得说出过原由吧。
现在这个回帖,你不再是在说随机抽查的不科学性,而是在说CNN的抽样的电话号码不
是随机的,是在质疑CNN的credibility吗?
Probability Sampling Methods:
1.Simple random sampling
2.Stratified sampling
3.Cluster sampling
4.Multistage sampling
5.Systematic random sampling
另外www.aapor.org有关于Random-Digit Dialing (RDD)的介绍
http://www.aapor.org/Education-Resources/Election-Polling-Resourc... 阅读全帖 |
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t********i 发帖数: 7856 | 39 按照白尸嚎的方案,最佳7%按照平时的GPA和每年的纽约州统考成绩来排序。我们先假
设,每个学校的“最佳7%学生”的认定方式和过程是公平公正的。
你知道,亚裔特别是华裔都尽可能选择好学区好学校。而老黑居住区也相对集中。老墨
比较分散,什么区都有。有点钱的住好区(考试肯定干不过亚裔),没钱的住烂区。总
的来说烂区多些。所以按照学校stratify(选择每个学校最优学生录取)可以在技术上
color blinded,但实际上达到种族AA的目的。你就是用 SHSAT 考试来评价也一样。 |
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y***g 发帖数: 10422 | 40 TSI 当然只有涡轮增压(turbo charger),没有机械增压(super charger)。
S 在这里表示 stratified,即分层燃烧的意思。不是 Super Charger。
手册上有没有写涡轮多少 rpm 开始启动?我记得大众早期的 1.8T 是 1750 rpm 启动。 |
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m***6 发帖数: 8479 | 41 英语的简写美丽无穷呀,呵呵
我都是网上看的,貌似FSI是说fule stratified injection?
动。 |
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w*********r 发帖数: 42116 | 42 Gasoline Direct Injection(GDI) , also known as Petrol Direct Injection or
Direct Petrol Injection or Spark Ignited Direct Injection(SIDI) or Fuel
Stratified Injection(FSI) .
现在不过是把一些新技术加进去。 |
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i****x 发帖数: 17565 | 43 我只是在消费市场上说大规模应用的情况。发明这个技术当然很早。我查了一下,下面
是现代GDI的主要商业应用,最成规模的就是toyota的v6,VW的FSI,BMW的N54,ford的
ecoboost。这几个里NA只有toyota。的我随意说几个大品牌而已,不用较真说每句都错
了吧。
Later systems
In 1996 gasoline direct injection reappeared in the automotive market.
Mitsubishi was the first with a GDI engine in the Japanese market with its
Galant/Legnum's 4G93 1.8 L inline-four.[11] It was subsequently brought to
Europe in 1997 in the Carisma,[12] although Europe's then high-sulfur
unleaded fuel led to emissions problems, and fuel eff... 阅读全帖 |
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a******n 发帖数: 1714 | 44 我没那么自恨。
http://en.wikipedia.org/wiki/Audi_S5
he 2010-12 Audi S5 coupé had a 4.2 litre Fuel Stratified Injection (FSI) V8
engine[4] that produces 260 kW (349 hp), while the S5 Cabriolet and
Sportback have a supercharged 3.0 litre TFSI V6 engine producing 245 kW (329
hp) which is shared with the 2010 Audi S4 3.0 TFSI quattro sedan and avant.
T |
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S*******n 发帖数: 10009 | 45 XC90看着稳重,Q5轻浮
猜猜这是哪车的引擎?
6-cylinder 280 hp engine with 3.0-liter displacement, dual overhead cam
valvetrain, turbocharged fuel stratified injection |
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w*f 发帖数: 4 | 46 加州尔湾公司现招募一名WEB Developer, Project Based:
Requirements:
- LAMP stack expert (specifically PHP and MYSQL)
- Familiar to setup the system from scratch at the web hosting to make WP
site live.
- WordPress savvy, at least 3+ years experience working with WP
- Bootstrap must. Must been able to work from PSD files to build bootstrap
theme for WordPress.
- Experience building custom jQuery/JavaScript/AJAX functionality.
- Bilingual Chinese/English is a plus.
* This is project based job, Successful and s... 阅读全帖 |
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