quinta-feira, 19 de setembro de 2019

Programa em SAS para Aplicar ANOVA e Teste de Comparações Múltiplas de Tukey

Programa em SAS para Aplicar ANOVA e Teste de Comparações Múltiplas de Tukey

data imc_dat;
input cat $ imc corr kcal;
cards;
AT 20.2 60.7 3200
AT 21.3 54.8 3100
AT 19.3 49.6 2800
AT 21.1 52.3 3300
SEM 22.4 14.9 2600
SEM 21.9 17.8 2700
SEM 23.8 18.6 3200
SEM 24.1 15.1 3300
SE  27.3 2.5 2700
SE  23.4 4.3 2300
SE  25.2 2.3 2600
SE  26.4 2.6 3200
PR 26.2 4.1 2600
PR 24.2 2.1 2700
PR 25.4 1.9 2650
;
proc print;
run;
proc anova;
    class cat;
    model imc corr kcal  = cat;
    means cat / tukey lines;
run;









Resultado do Programa de MANOVA:
Arquivo para Download (mht abrir no Wodr)
Arquivo Word de Resultados



The SAS System

Obs
cat
imc
corr
kcal
1
AT
20.2
60.7
3200
2
AT
21.3
54.8
3100
3
AT
19.3
49.6
2800
4
AT
21.1
52.3
3300
5
SEM
22.4
14.9
2600
6
SEM
21.9
17.8
2700
7
SEM
23.8
18.6
3200
8
SEM
24.1
15.1
3300
9
SE
27.3
2.5
2700
10
SE
23.4
4.3
2300
11
SE
25.2
2.3
2600
12
SE
26.4
2.6
3200
13
PR
26.2
4.1
2600
14
PR
24.2
2.1
2700
15
PR
25.4
1.9
2650




The SAS System

The ANOVA Procedure
Class Level Information
Class
Levels
Values
cat
4
AT PR SE SEM

Number of Observations Read
15
Number of Observations Used
15




The SAS System

The ANOVA Procedure

Dependent Variable: imc
Source
DF
Sum of Squares
Mean Square
F Value
Pr > F
Model
3
63.99233333
21.33077778
14.23
0.0004
Error
11
16.49166667
1.49924242


Corrected Total
14
80.48400000




R-Square
Coeff Var
Root MSE
imc Mean
0.795094
5.214802
1.224436
23.48000

Source
DF
Anova SS
Mean Square
F Value
Pr > F
cat
3
63.99233333
21.33077778
14.23
0.0004



Gráfico Chamado: Box and Wisker Plot






The SAS System

The ANOVA Procedure

Dependent Variable: corr
Source
DF
Sum of Squares
Mean Square
F Value
Pr > F
Model
3
6829.158500
2276.386167
300.25
<.0001
Error
11
83.397500
7.581591


Corrected Total
14
6912.556000




R-Square
Coeff Var
Root MSE
corr Mean
0.987935
13.60410
2.753469
20.24000

Source
DF
Anova SS
Mean Square
F Value
Pr > F
cat
3
6829.158500
2276.386167
300.25
<.0001





The SAS System

The ANOVA Procedure

Dependent Variable: kcal
Source
DF
Sum of Squares
Mean Square
F Value
Pr > F
Model
3
497333.333
165777.778
1.95
0.1801
Error
11
935000.000
85000.000


Corrected Total
14
1432333.333




R-Square
Coeff Var
Root MSE
kcal Mean
0.347219
10.18210
291.5476
2863.333

Source
DF
Anova SS
Mean Square
F Value
Pr > F
cat
3
497333.3333
165777.7778
1.95
0.1801


Sabemos que existem diferenças entre as categorias para Índice de Massa Corporal e para Quilômetros caminhados ou corridos por semana. Para as Quilocalorias não achamos diferenças entre as categorias.




The SAS System

The ANOVA Procedure




The SAS System

The ANOVA Procedure

Tukey's Studentized Range (HSD) Test for imc

Note:
This test controls the Type I experimentwise error rate, but it generally has a higher Type II error rate than REGWQ.

Alpha
0.05 = 5%
Error Degrees of Freedom
11
Error Mean Square
1.499242
Critical Value of Studentized Range
4.25603
Minimum Significant Difference
2.712
Harmonic Mean of Cell Sizes
3.692308

Note:
Cell sizes are not equal.

Means with the same letter
are not significantly different.
Tukey Grouping
Mean
N
cat

A
25.5750
4
SE

A




A
25.2667
3
PR

A



B
A
23.0500
4
SEM
B




B

20.4750
4
AT




The SAS System

The ANOVA Procedure





The SAS System

The ANOVA Procedure

Tukey's Studentized Range (HSD) Test for corr

Note:
This test controls the Type I experimentwise error rate, but it generally has a higher Type II error rate than REGWQ.

Alpha
0.05
Error Degrees of Freedom
11
Error Mean Square
7.581591
Critical Value of Studentized Range
4.25603
Minimum Significant Difference
6.0987
Harmonic Mean of Cell Sizes
3.692308

Note:
Cell sizes are not equal.

Means with the same letter
are not significantly different.
Tukey Grouping
Mean
N
cat
A
54.350
4
AT




B
16.600
4
SEM




C
2.925
4
SE
C



C
2.700
3
PR




The SAS System

The ANOVA Procedure





The SAS System

The ANOVA Procedure

Tukey's Studentized Range (HSD) Test for kcal

Note:
This test controls the Type I experimentwise error rate, but it generally has a higher Type II error rate than REGWQ.

Alpha
0.05
Error Degrees of Freedom
11
Error Mean Square
85000
Critical Value of Studentized Range
4.25603
Minimum Significant Difference
645.75
Harmonic Mean of Cell Sizes
3.692308

Note:
Cell sizes are not equal.


Means with the same letter
are not significantly different.
Tukey Grouping
Mean
N
cat
A
3100.0
4
AT
A



A
2950.0
4
SEM
A



A
2700.0
4
SE
A



A
2650.0
3
PR











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