系列笔记-USYD悉尼大学Data1001 RQuiz1——RQuiz6 做法讲解

    科技2022-07-11  144

    Rquiz1—Rquiz6

    学期一共12个Rquiz(算final成绩)和12个Lquiz(不算final成绩),和final挂钩的考试一定要认真对待。这些quiz都是送分题,希望这篇博客能助你一臂之力。

    文章目录

    Rquiz1---Rquiz6前言RQuiz 1Question 1Question 2Question 3Question 4Question 5 RQuiz 2Question 1Question 2Question 3Question 4Question 5 总结


    前言

    创作不易,拒绝抄袭,可以引用,标明出处。 小编会尽力去完善每一个知识点,如果有错误,漏掉的内容欢迎留言私信补充。


    RQuiz 1

    Question 1

    To calculate log(4), which would work in R code?

    > log(4) > In(4) >Ine(4) LOG(4)

    讲解: 把这四个选项每个放在rstudio里运行一下,只有log(4)能运行出结果。

    Question 2

    Which code is correct?

    getwd() setwd(x=c(1,2,3)) help[getwd] setwd(’…’)

    讲解: 放在Rstudio里运行,R语言的语法,其余都有不同的程序错误。

    Question 3

    What is the answer to the following R code? x=c(1,2,3,4,5) sum(x) + sort(x)[2]

    17 16 15 14

    讲解: 放在rstudio里运行

    x=c(1,2,3,4,5) sum(x)+sort(x)[2] #outpot:17

    Question 4

    x=c(-1,2,3,-4,5) Which commands sorts the data?

    sort(x) Sort(x) SORT(x) sort(x)

    讲解: 放在Rstudio里运行一下,只有sort(x)没有出错。

    Question 5

    “Simpson’s Paradox occurs when relationships between percentages in subgroups are the same, when the subgroups are combined, because of a confounding or lurking variable”.

    True False

    讲解: 理论题。 题目翻译:当子组中的百分比之间的关系相同时,或者由于混淆或潜伏变量而将子组合并时,就会发生“辛普森悖论”。


    RQuiz 2

    Question 1

    In the sleep dataset, how many levels does the group variable have?

    4 2 6 8

    讲解: 问在sleep数据集中,group变量有多少个级别?答案是两个。

    Question 2

    What is the length of the depth variable in quakes?

    10 100 1000 10000

    讲解: 问地震中深度变量的长度是多少?

    Question 3

    Which command would isolate a variable in the sleep dataset?

    sleep$extras sleep$age sleep$time sleep$group

    解释: 问哪个命令将隔离睡眠数据集中的变量?

    Question 4

    What is the result of the following code?

    dim(mtcars^2) 1024 121 32 11 NULL 123904

    讲解: 带入Rstudio里运行。

    Question 5

    In the Australian road fatality dataset (L4), what type of variable is BusInvolvement?

    Quantitative - continuou Quantitative - discrete Qualitative - binary Qualitative - ordinal

    讲解: 在澳大利亚道路死亡数据集(L4)中,涉及公共汽车的变量类型是什么?


    总结

    更新中ing

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