ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 1 22:46 Sunday, March 2, 2003
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1 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 1 22:46 Sunday, March 2, 2003 The MEANS Procedure DRINKING STATUS=1 Analysis Variable : TRIGL N Mean Std Dev Minimum Maximum DRINKING STATUS=2 Analysis Variable : TRIGL N Mean Std Dev Minimum Maximum DRINKING STATUS=3 Analysis Variable : TRIGL N Mean Std Dev Minimum Maximum
2 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 2 unadjusted models with alcat 22:46 Sunday, March 2, 2003 The GLM Procedure Class Level Information Class Levels Values ALCAT Number of observations 305
3 Dependent Variable: TRIGL ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 3 unadjusted models with alcat 22:46 Sunday, March 2, 2003 The GLM Procedure Sum of Squares Mean Square F Value Pr > F Model Error Corrected Total R-Square Coeff Var Root MSE TRIGL Mean Type I SS Mean Square F Value Pr > F ALCAT Type III SS Mean Square F Value Pr > F ALCAT
4 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 4 unadjusted models with alcat 22:46 Sunday, March 2, 2003 The GLM Procedure Least Squares Means ALCAT TRIGL LSMEAN
5 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 5 unadjusted models with alcat 22:46 Sunday, March 2, 2003 The REG Procedure Model: MODEL1 Dependent Variable: TRIGL Analysis of Variance Sum of Squares Mean Square F Value Pr > F Model Error Corrected Total Root MSE R-Square Dependent Mean Adj R-Sq Coeff Var Variable Parameter Estimates Parameter Estimate Standard Error t Value Pr > t Intercept <.0001 EXDRK CRDRK
6 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 6 unadjusted models with alcat 22:46 Sunday, March 2, 2003 The REG Procedure Model: MODEL1 Test ALCAT Results for Dependent Variable TRIGL Mean Square F Value Pr > F Numerator Denominator
7 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 7 alcat by sex association 22:46 Sunday, March 2, 2003 The FREQ Procedure Frequency Row Pct Table of ALCAT by SEX ALCAT(DRINKING STATUS) SEX Total Total
8 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 8 covariate adjusted models with alcat 22:46 Sunday, March 2, 2003 The GLM Procedure Class Level Information Class Levels Values ALCAT SEX Number of observations 305
9 Dependent Variable: TRIGL ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 9 covariate adjusted models with alcat 22:46 Sunday, March 2, 2003 The GLM Procedure Sum of Squares Mean Square F Value Pr > F Model <.0001 Error Corrected Total R-Square Coeff Var Root MSE TRIGL Mean Type I SS Mean Square F Value Pr > F ALCAT SEX AGE WEIGHT CHOLEST <.0001 Type III SS Mean Square F Value Pr > F ALCAT SEX AGE WEIGHT CHOLEST <.0001
10 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 10 covariate adjusted models with alcat 22:46 Sunday, March 2, 2003 The GLM Procedure Least Squares Means ALCAT TRIGL LSMEAN SEX TRIGL LSMEAN
11 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 11 covariate adjusted models with alcat 22:46 Sunday, March 2, 2003 The REG Procedure Model: MODEL1 Dependent Variable: TRIGL Analysis of Variance Sum of Squares Mean Square F Value Pr > F Model <.0001 Error Corrected Total Root MSE R-Square Dependent Mean Adj R-Sq Coeff Var Variable Parameter Estimates Parameter Estimate Standard Error t Value Pr > t Intercept EXDRK CRDRK SEX AGE WEIGHT CHOLEST <.0001
12 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 12 covariate adjusted models with alcat 22:46 Sunday, March 2, 2003 The REG Procedure Model: MODEL1 Test ALCAT Results for Dependent Variable TRIGL Mean Square F Value Pr > F Numerator Denominator
13 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 13 sex by age interaction model 22:46 Sunday, March 2, 2003 The REG Procedure Model: MODEL1 Dependent Variable: TRIGL Analysis of Variance Sum of Squares Mean Square F Value Pr > F Model Error Corrected Total Root MSE R-Square Dependent Mean Adj R-Sq Coeff Var Variable Parameter Estimates Parameter Estimate Standard Error t Value Pr > t Intercept SEX AGE sexage
14 ANALYSES OF NCGS DATA FOR ALCOHOL STATUS CATEGORIES 14 sex by age interaction model 22:46 Sunday, March 2, 2003 The REG Procedure Model: MODEL1 Test sex Results for Dependent Variable TRIGL Mean Square F Value Pr > F Numerator Denominator
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/ 7 Parametrisations, splines Analysis of variance and regression course http://staff.pubhealth.ku.dk/~lts/regression_2 Marc Andersen, mja@statgroup.dk Analysis of variance and regression for health researchers,
Example: Four levels of herbicide strength in an experiment on dry weight of treated plants.
The idea of ANOVA Reminders: A factor is a variable that can take one of several levels used to differentiate one group from another. An experiment has a one-way, or completely randomized, design if several