Head first statistics ch15
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Head first statistics ch15

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Head first statistics ch15 Head first statistics ch15 Presentation Transcript

  • Head First Statistics Ch 15Correlation and regression 아키텍트를 꿈꾸는 사람들 발표 : 김연기
  • Analyze sunshine and attendance- 표준 편차나 평균값으로 예상 관중수를 찾을수 없다.
  • Bivariate Data- bivariate Data : 관찰할때 2개의 상태값을 가지는 데이터.- dependent variable : 관측 데이터에서 영향을 미치는 변수-Independent variable : 독립변수로 인해 발생되는 응답 변수 Dependent variable Independent variable
  • Analyze sunshine and attendance
  • Analyze sunshine and attendance
  • Positive Linear correlation
  • Negative Linear correlation
  • No correlation
  • Correlation Vs. CausationCorrelation : 두 변수간 산술적인 관계가 있을때 상관관계(Correlation)라 할 수 있다.Causation : 두변수간 수직적으로 표현 할수 없지만 직접적인 영향을가질때 원인(Causation)관계라 할수 있다.
  • Predict values with a line of best fit
  • Predict values with a line of best fit
  • Predict values with a line of best fit실제값과 예상값의 총 차이 :
  • Sum Of Squared Errors
  • Find Slope(기울기)
  • Correlation Coefficient두 변수간 밀접하게 관계하고 있는지 측정.
  • Correlation Coefficient