arithmetic(SMPracticals)
arithmetic()所属R语言包:SMPracticals
Teaching Arithmetic Data
教算术数据
译者:生物统计家园网 机器人LoveR
描述----------Description----------
45 school pupils were divided at random into 5 groups of size 9. Groups A and B were taught arithmetic in separate classes by the usual method. Groups C, D, and E were taught together for several days. On each day group C were publically praised, group D were publically reproved, and group E were ignored. The responses are from a standard test taken by all pupils at the end of the period.
45个学校的学生被随机分为5组,每组大小为9分。 A,B组分别在单独的类的常用方法教算术。 C,D组和E是教了好几天。公开称赞的每一天,C组,D组公开责备,被忽略和E组。的响应是从一个标准的测试的期间结束时所采取的所有学生。
用法----------Usage----------
data(arithmetic)
格式----------Format----------
A data frame with 45 observations on the following 2 variables.
45个观察以下2个变量的数据框。
group a factor with levels A B C D E
组的一个因素水平ABCDE
y a numeric vector
Ÿ一个数值向量
源----------Source----------
Unpublished lecture notes, Imperial College, London.
未发表的讲义,伦敦帝国学院。
参考文献----------References----------
Page 427.
实例----------Examples----------
data(arithmetic)
attach(arithmetic)
plot(y~group)
anova(lm(y~group,data=arithmetic))
summary(lm(y~group,data=arithmetic)) # two different parametrisations[两种不同的parametrisations]
summary(lm(y~group-1,data=arithmetic)) # for ANOVA[为ANOVA]
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注:
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