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สถิติสำหรับการวิจัย PowerPoint PPT Presentation


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สถิติสำหรับการวิจัย. รศ.ดร.โยธิน แสวงดี สถาบันวิจัยประชากรและสังคม มหาวิทยาลัยมหิดล. สถิติสำหรับการวิจัย. สถิติมีความสำคัญคือ เป็นข้อมูล แสดงลักษณะการดำรงคงอยู่ของสถานะของข้อมูล ปรากกฏการณ์ สถานะภาพ ฯลฯ

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5775100

..


5775100

  • Mean Mode Median S.D.


5775100

  • ( )


5775100

  • Ho Null Hypothesis

  • =

  • Ha Alternative Hypothesis

  • > <

  • Ha ()


T test

t-test

  • 30

  • ( )


T test1

t-test

  • One sample t-test TOEFL

  • Independent-Samples t-test

  • Paired-samples t-test


F test one way analysis of variance

F-test (One-Way Analysis of Variance)

  • 3

  • 3 treatment 2 treatment 1

  • 3

  • Post-Hoc test


Multivariate analysis 1 ancova

Multivariate Analysis: (1) ANCOVA

  • ANOVA Univariate

  • CO Covariance

  • Covariate Variable dummy variable (1,0 = 1 = 0 )


2 manova

(2) MANOVA

  • ANOVA Multivariate

  • M Multivariate 1

  • 3


3 mancova

(3) MANCOVA

  • MANOVA

  • ( )

  • ANCOVA


Chi squared test

Chi-squared Test

  • 5

  • n cell 5

  • (Association) Contingency Coefficient: C)


Pearson correlation

Pearson Correlation

  • -1 1

  • t

  • Partial correlation

  • Collinearity Multicollinearity Multiple Regression

  • (Cut point 0.5 0.65 0.75)


5775100

  • Factors Analysis, Discriminant Analysis

  • Inferential Statistics

  • PATH ANALYSIS

  • (SEM)


Simple regression analysis

Simple Regression Analysis

  • Causal Relationships -Positivism

  • Cause----- Consequence

  • Cause--- Effect

  • -

  • (Basic Econometrics)


5775100

  • n 30

  • True Direct Real Effect

  • dummy variable

  • F, R-squared 1


Multiple regression analysis mra

Multiple Regression Analysis: MRA

  • Causal Relationships

  • when everything being equals

  • dummy variable

  • Basic assumption ( )

  • PRF SRF

  • 1 30

  • Constrained Model Unconstrained Model (F-Ratio test)

  • R-squared Change


Mra method

MRA: Method

  • Enter

  • Forward

  • Backward

  • Remove

  • Stepwise

  • ?


Logistic regression analysis

Logistic Regression Analysis

  • Causal Relationship

  • 1= 0=

  • Binomial Bi = nominal

  • Dichotomous outcome variable


5775100

  • Non-linear probability model

  • Linear probability model

  • Chi-squared test, Model Chi-squared

  • Restricted Model Unrestricted Model

  • Log likelihood Ratio test: LR test

  • Adjusted Proportional Probabilities

  • computer


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