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c:ps1-2:2019:schedule [2019/09/30 20:27] – [Week04 (Sep 23, 25)] hkimscilc:ps1-2:2019:schedule [2019/12/10 12:34] – [Week02 (Sep 9, 11)] hkimscil
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 </WRAP> </WRAP>
  
-====== Week02 (Sep 9, 11) ======+====== Week02 (Sep 10, 12) ======
 <WRAP half column> <WRAP half column>
 ===== ideas and concepts  ===== ===== ideas and concepts  =====
-정보의 시각화: 첫인상 +[[:b:head first statistics:Visualization|정보의 시각화]]
-  * {{:info.vis.01.xlsx}} +
- +
-  * Scatter plot  +
-<code># Simple Scatterplot +
-attach(mtcars) +
-plot(wt, mpg, main="Scatterplot Example", +
-   xlab="Car Weight ", ylab="Miles Per Gallon ",  +
-   pch=19)</code> +
- +
-{{:c:ps1-1:2019:pasted:20190909-075028.png}} +
- +
-explanatory (설명) variable at x axis +
-response (반응) at y axis +
- +
-But, it does mean __no causal relationship__ between the two variables. Association between two does not guarantee a causal relationship.   +
- +
-Drawing a line among the data. +
-<code># Add fit lines +
-abline(lm(mpg~wt), col="red") # regression line (y~x) +
-lines(lowess(wt,mpg), col="blue") # lowess line (x,y)</code> +
-{{:c:ps1-1:2019:pasted:20190909-075639.png}} +
- +
- +
-A bit more fancy line  +
-<code># Enhanced Scatterplot of MPG vs. Weight +
-# by Number of Car Cylinders +
-library(car) +
-scatterplot(mpg ~ wt | cyl, data=mtcars, +
-   xlab="Weight of Car", ylab="Miles Per Gallon", +
-   main="Enhanced Scatter Plot", +
-   labels=row.names(mtcars))</code> +
-{{:c:ps1-1:2019:pasted:20190909-080032.png}} +
- +
-Line can be:  +
- +
-**__관계의 방향 (direction)__** +
-^  관계의 방향  ^^  +
-| {{:r.positive.png}}  | {{:r.negative.png}}  | +
- +
- +
-**__관계의 모양 (shape)__** +
-^  관계의 모양  ^^  +
-| {{:r.positive.png}}  | {{:r.curvepositive.png}}  | +
- +
-**__관계의 정도 (힘)__** +
-^  관계의 정도 (힘)  ^^  +
-| [{{:r.StrengthA.png|Figure_4-1}}]  | [{{:r.StrengthB.png|Figure 4-2}}]  | +
-| [{{:r.StrengthC.png|Figure_4-3}}]  | [{{:r.StrengthD.png|Figure 4-4}}]  | +
-<WRAP clear /> +
-Pearson's r 의 의미 +
-__Relations, not cause-effect__ +
-[{{:r_eg.15.6.png?250 |Figure 6. Correlation And Causation}}] 상관관계 계수는 단순히 두 변인 (x, y) 간의 관계가 있다는 것을 알려줄 뿐, 왜 그 관계가 있는지는 설명하지 않는다. 바꿔 말하면, 충분한 r 값을 구했다고 해서 이 값이 두 변인 간의 '''원인'''과 '''결과'''의 관계를 말한다고 이야기 하면 __안된다__. 예를 들면 아이스크림의 판매량과 성범죄가 서로 상관관계에 있다고 해서, 전자가 후자의 원인이라고 단정할 수 있는 근거는 없다. 이는 연구자의 논리적인 판단 혹은 이론적인 판단에 따른다.  +
-<WRAP clear /> +
- +
-__Interpretation with limited range__ +
-[{{:r_eg.15.71.png?250 |Figure_7._Correlation_And_Range}}]  +
-[{{:r_eg.15.7b1.png?250 |Figure_7._Correlation_And_Range}}]  +
-데이터의 [[Range]]에 대한 판단에 신중해야 한다. 왜냐 하면, 데이터의 어느 곳을 자르느냐에 따라서 r 값이 심하게 변하기 때문이다.  +
-<WRAP clear /> +
-__Outliers__ +
-[{{:r_eg.15.8a.png?250 |Figure_7._Correlation_And_Extreme_Data}}]  +
-[{{:r_eg.15.8b.png?250 |Figure_7._Correlation_And_Extreme_Data}}]  +
-위의 설명과 관련하여, 만약에 아주 심한 Outlier가 존재한다면 두 변인 간의 상관관계에 심한 영향을 준다. +
-[{{:pearson-6.png?300 |}}] +
- +
-make it sure that there is __no data entry error__. +
-{{:r.crime.scatterplot.for.single.by.state.jpg}} +
- +
- +
-<WRAP clear /> +
- +
-see  +
-https://www.gapminder.org/answers/how-does-income-relate-to-life-expectancy/ +
-{{youtube>hVimVzgtD6w}}+
  
 </WRAP> </WRAP>
- 
 <WRAP half column> <WRAP half column>
-{{:c:ps1-1:2019:pasted:20190909-103341.png}} 
- 
-{{:life.exp.csv}} 
- 
-<code>> le <- as.data.frame(read.csv("http://commres.net/wiki/_media/life.exp.csv", header=T)) 
-> colnames(le)[1] <- "c.code" 
-> lea <- le$X2017 
-> leb <- lea[complete.cases(lea)] 
-> hist(leb, color="grey")</code> 
- 
-{{:c:ps1-1:2019:pasted:20190909-110252.png}} 
- 
-{{:c:ps1-1:2019:pasted:20190909-104759.png}} 
- 
-{{:c:ps1-1:2019:pasted:20190909-111117.png}} 
- 
-{{:c:ps1-1:2019:pasted:20190909-111001.png}} 
- 
-box plot 
-<code>> # Boxplot of MPG by Car Cylinders 
-> boxplot(mpg~cyl,data=mtcars, main="Car Milage Data", 
-+         xlab="Number of Cylinders", ylab="Miles Per Gallon") 
->  
-> </code> 
-{{:c:ps1-1:2019:pasted:20190909-111438.png}} 
  
 ===== Assignment ===== ===== Assignment =====
 </WRAP> </WRAP>
  
-====== Week03 (Sep 16, 18) ======+====== Week03 (Sep 17, 19) ======
 <WRAP half column> <WRAP half column>
 [[:b:head first statistics:measuring central tendency|중심적 경향 측정하기 ]] [[:b:head first statistics:measuring central tendency|중심적 경향 측정하기 ]]
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 </WRAP> </WRAP>
  
-====== Week04 (Sep 23, 25) ======+====== Week04 (Sep 24, 26) ======
 <WRAP half column> <WRAP half column>
 [[:b:head first statistics:Variability and Spread|변이와 분포 측정하기]] [[:b:head first statistics:Variability and Spread|변이와 분포 측정하기]]
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 </WRAP> </WRAP>
  
-====== Week05 (Sep 30, Oct 2) ======+====== Week05 (Oct 1, 3) ======
 <WRAP half column> <WRAP half column>
 [[:b:head first statistics:calculating probability]] 확률 계산하기 [[:b:head first statistics:calculating probability]] 확률 계산하기
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 </WRAP> </WRAP>
  
-====== Week06 (Oct 7, 9) ======+====== Week06 (Oct 8, 10) ======
 <WRAP half column> <WRAP half column>
 [[:b:head first statistics:using discrete probability distributions]] 이산확률분포 [[:b:head first statistics:using discrete probability distributions]] 이산확률분포
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 </WRAP> </WRAP>
  
-====== Week07 (Oct 14, 16) ======+====== Week07 (Oct 15, 17) ======
 <WRAP half column> <WRAP half column>
-순열과 조합+[[:b:head first statistics:permutation and combination|순열과 조합]]
 ===== ideas and concepts  ===== ===== ideas and concepts  =====
 </WRAP> </WRAP>
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 </WRAP> </WRAP>
  
-====== Week08 (Oct 21, 23)  ======+====== Week08 (Oct 22, 24)  ======
 <WRAP half column> <WRAP half column>
 __**Mid-term period**__  __**Mid-term period**__ 
 </WRAP> </WRAP>
  
-====== Week09 (Oct 28, 30) ======+====== Week09 (Oct 29, 31) ======
 <WRAP half column> <WRAP half column>
 ===== ideas and concepts  ===== ===== ideas and concepts  =====
-기하, 이항, 푸아송 분포+[[:b:head first statistics:Geometric, Binomial, and Poisson Distributions|기하, 이항, 푸아송 분포]] 
 </WRAP> </WRAP>
 <WRAP half column> <WRAP half column>
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 </WRAP> </WRAP>
  
-====== Week10 (Nov 4, 6) ======+====== Week10 (Nov 5, 7) ======
 <WRAP half column> <WRAP half column>
-정규분포 1+[[:b:head first statistics:using the normal distribution|정규분포]] Chapter 8, 9
 ===== ideas and concepts  ===== ===== ideas and concepts  =====
 </WRAP> </WRAP>
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 </WRAP> </WRAP>
  
-====== Week11 (Nov 11, 13) ======+====== Week11 (Nov 12, 14) ======
 <WRAP half column> <WRAP half column>
 ===== ideas and concepts  ===== ===== ideas and concepts  =====
-정규분포 2+[[:b:head first statistics:using the normal distribution|정규분포]] Chapter 8, 9
 </WRAP> </WRAP>
 <WRAP half column> <WRAP half column>
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 </WRAP> </WRAP>
  
-====== Week12 (Nov 18, 20) ======+====== Week12 (Nov 19, 21) ======
 <WRAP half column> <WRAP half column>
-통계 표본+[[:b:head first statistics:using statistical sampling|통계 표본]]
 ===== ideas and concepts  ===== ===== ideas and concepts  =====
 </WRAP> </WRAP>
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 </WRAP> </WRAP>
  
-====== Week13 (Nov 25, 27) ======+====== Week13 (Nov 26, 28) ======
 <WRAP half column> <WRAP half column>
 ===== ideas and concepts  ===== ===== ideas and concepts  =====
-모집단과 표본 추정+[[:b/head_first_statistics/estimating_populations_and_samples|모집단과 표본 추정]]
 </WRAP> </WRAP>
 <WRAP half column> <WRAP half column>
 ===== Assignment ===== ===== Assignment =====
 +===== Announcement =====
 +Quiz 4 (Tuesday, Dec. 3) 범위:
 +  * [[:b/head_first_statistics/geometric_binomial_and_poisson_distributions|기하, 이항, 푸아송 분포]]
 +  * [[:b/head_first_statistics/using_the_normal_distribution|정규분포]]
 +  * [[:b/head_first_statistics/using_statistical_sampling|통계 표본]]
 +  * [[:b/head_first_statistics/estimating_populations_and_samples|모집단과 표본 추정]]
 +    * 모집단과 표본추정은 [[:b/head_first_statistics/estimating_populations_and_samples#how_many_gumballs_--_probability_of_sample_means|How many gumballs? -- Probability of sample means]] 바로 전까지
 + 
 +
 </WRAP> </WRAP>
  
-====== Week14 (Dec 2, 4) ======+====== Week14 (Dec 3, 5) ======
 <WRAP half column> <WRAP half column>
-신뢰구간 설정 +[[:b:head first statistics:constructing confidence intervals|신뢰구간 설정]]</WRAP>
-</WRAP>+
  
-====== Week15 (Dec 9, 11) ======+====== Week15 (Dec 10, 12) ======
 <WRAP half column> <WRAP half column>
-가설검증 이용하기+[[:b:head first statistics:using hypothesis tests|가설검증 이용하기]]
 </WRAP> </WRAP>
  
-====== Week16 (Dec 16, 18) ======+====== Week16 (Dec 17, 19) ======
 <WRAP half column> <WRAP half column>
-__**Final-term**__+**Final-term** will cover: (마지막 퀴즈 시험범위) 
 +9주차부터 15주차까지입니다. 
 +  * [[:b:head first statistics:geometric, binomial, and poisson distributions|기하, 이항, 푸아송 분포]]  
 +  * [[:b:head first statistics:using the normal distribution|정규분포]] Chapter 8, 9 
 +  * [[:b:head first statistics:using statistical sampling|통계 표본]] 
 +  * [[:b:head first statistics:estimating populations and samples|모집단과 표본 추정]] 
 +  * [[:b:head first statistics:constructing confidence intervals|신뢰구간 설정]] 
 +  * [[:b:head first statistics:using hypothesis tests|가설검증 이용하기]] 
 </WRAP> </WRAP>
  
c/ps1-2/2019/schedule.txt · Last modified: 2019/12/10 12:34 by hkimscil
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