R语言 Sleuth2包 ex2117()函数中文帮助文档(中英文对照)

loveR

ex2117(Sleuth2)
ex2117()所属R语言包：Sleuth2

                                        Effect of Stress During Conception on Odds of a Male Birth
                                         赔率的男出生在概念上的应力的影响

                                         译者：生物统计家园网 机器人LoveR

描述----------Description----------

The probability of a male birth in humans is about .51.  It has previously been noticed that lower proportions of male births are observed when offspring is conceived at times of exposure to smog, floods or earthquakes.  Danish researchers hypothesised that sources of stress associated with severe life events may also have some bearing on the sex ratio.  To investigate this theory they obtained the sexes of all 3,072 children who were born in Denmark between 1 January 1980 and 31 December 1992 to women who experienced the following kind of severe life events in the year of the birth or the year prior to the birth: death or admission to hospital for cancer or heart attack of their partner or of their other children.  They also obtained sexes on a sample of 20,337 births to mothers who did not experience these life stress episodes.  This data frame contains the data that were collected.  Noticed that for one group the exposure is listed as taking place during the first trimester of pregnancy.  The rationale for this is that the stress associated with the cancer or heart attack of a family member may well have started before the recorded time of death or hospital admission.
在人类中的男性出生的概率是0.51。它被发现时观察到后代的设想在暴露于烟雾，洪水或地震时出生男孩的比例较低。丹麦研究人员假设，严重的生活事件相关的压力来源的性别比例也有一定的影响。为了研究这一理论，他们获得了男女所有3,072名儿童出生在丹麦的妇女经历了以下几个种严重的生活事件或出生前一年的出生年1992年1980年1月1日至12月31日：死亡或住院的癌症或心脏病发作他们的伴侣或其他子女到医院。他们还获得了男女20,337出生的母亲，谁没有经历过这些生活压力事件的样本。该数据框包含的数据收集。注意到，一组曝光被列为发生在怀孕的头三个月。这样做的原因是，与家庭成员的癌症或心脏病发作的压力很可能已经死亡或入院记录的时间开始前。


用法----------Usage----------


ex2117



格式----------Format----------

A data frame with 5 observations on the following 4 variables.   
一种数据框与5上的以下4个变量的观察。

GroupIndicator for groups to which mothers belong
Group指标的母亲属于的组

TimeIndicator for time at which severe life event occurred
Time指标的时间在发生严重的生活事件

NumberNumber of births
Number出生人数

PctBoysPercentage of boys born   
PctBoys出生的男孩比例


源----------Source----------

Ramsey, F.L. and Schafer, D.W. (2002). The Statistical Sleuth: A Course in Methods of Data Analysis (2nd ed), Duxbury.
拉姆齐，F.L.和Schafer，D.W. （2002年）。的统计的猎犬：A课程方法的数据分析（第二版），达克斯伯里。


参考文献----------References----------

Hansen, D., M酶ller, H. and Olsen, J. (1999).  Severe Periconceptional Life Events and the Sex Ratio in Offspring: Follow Up Study based on Five National Registers, British Medical Journal 319(7209): 548–549.

实例----------Examples----------


str(ex2117)

转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。


注：
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