### One Way MANOVA
data1 <- read.csv("D:/UNPAD/Semester 3/Analisis Data Multivariat 1/rokokk.csv")
data1
##    Year Age_Group Gender Smoking_Prevalence Drug_Experimentation
## 1  2024     15-19   Both              18.85                32.40
## 2  2024     10-14 Female              34.88                41.57
## 3  2023     10-14   Both              42.00                56.80
## 4  2024     40-49   Both              33.75                42.90
## 5  2023     15-19   Male              47.90                39.62
## 6  2022     70-79   Male              20.14                47.29
## 7  2021     30-39 Female              38.38                26.60
## 8  2022     10-14 Female               7.87                54.67
## 9  2021     70-79   Both              11.61                63.65
## 10 2020     60-69 Female              23.98                17.62
## 11 2020     40-49   Male              42.85                66.66
## 12 2022     50-59   Both              48.72                11.41
## 13 2024     25-29   Male              37.71                19.46
## 14 2022     60-69 Female              44.99                42.47
## 15 2020     15-19   Male              11.78                65.31
## 16 2020     60-69   Male              41.94                62.21
## 17 2023     30-39   Both              49.99                57.28
## 18 2024     15-19 Female              24.61                39.62
## 19 2021     30-39 Female              15.08                22.28
## 20 2021     15-19   Male              15.40                30.66
## 21 2023     30-39   Both              15.17                45.36
## 22 2022     70-79   Male              10.49                50.57
## 23 2021     25-29 Female               9.95                67.80
## 24 2020     60-69   Male              26.59                14.25
## 25 2022     15-19   Male              18.41                15.59
## 26 2023     15-19 Female              46.00                32.20
## 27 2020     10-14   Both              14.80                69.46
## 28 2022     60-69   Male              12.27                18.92
## 29 2023       80+   Male               6.51                10.85
##    Socioeconomic_Status Peer_Influence School_Programs Family_Background
## 1                  High              5             Yes                 1
## 2                  High              6             Yes                10
## 3                  High              6             Yes                 2
## 4                Middle             10              No                 9
## 5                  High              1              No                 2
## 6                  High             10             Yes                 7
## 7                   Low              4              No                 7
## 8                Middle              5             Yes                 9
## 9                   Low              9             Yes                 1
## 10                  Low              2              No                 3
## 11                 High              5              No                 5
## 12                 High              2              No                 8
## 13                  Low              5             Yes                 2
## 14                 High              8              No                 4
## 15                  Low              9              No                 1
## 16                  Low              5             Yes                 9
## 17                 High              2             Yes                 9
## 18               Middle             10              No                 8
## 19                 High              1             Yes                 6
## 20                  Low              3             Yes                 7
## 21                  Low              6             Yes                 4
## 22               Middle              6             Yes                 9
## 23                 High              3             Yes                 4
## 24                 High              2             Yes                 3
## 25               Middle              7              No                 3
## 26                 High              1              No                 7
## 27               Middle              3              No                 6
## 28               Middle              9             Yes                 7
## 29               Middle              6             Yes                 5
##    Mental_Health Access_to_Counseling Parental_Supervision Substance_Education
## 1              5                   No                    4                  No
## 2              5                   No                    9                 Yes
## 3              7                  Yes                    2                  No
## 4              7                  Yes                    2                  No
## 5              4                  Yes                    4                  No
## 6              4                   No                    4                  No
## 7              1                  Yes                    2                  No
## 8              2                   No                    4                  No
## 9              6                  Yes                    5                 Yes
## 10             6                  Yes                    5                 Yes
## 11             3                   No                    9                  No
## 12             3                  Yes                   10                  No
## 13             4                  Yes                    1                  No
## 14             1                   No                    5                 Yes
## 15            10                   No                    2                 Yes
## 16             9                  Yes                    2                  No
## 17             3                  Yes                    4                  No
## 18             4                  Yes                    8                  No
## 19             8                   No                    7                 Yes
## 20             5                   No                    5                 Yes
## 21             3                   No                   10                 Yes
## 22             2                   No                    2                 Yes
## 23             7                  Yes                    6                  No
## 24             6                   No                   10                  No
## 25             9                  Yes                    6                  No
## 26             1                  Yes                    3                  No
## 27            10                  Yes                    8                  No
## 28            10                  Yes                    6                 Yes
## 29            10                  Yes                    9                 Yes
##    Community_Support Media_Influence
## 1                  3               1
## 2                  9               3
## 3                  5               1
## 4                 10               9
## 5                 10               3
## 6                  4               2
## 7                  4              10
## 8                  4               2
## 9                  2               6
## 10                 9               9
## 11                 2              10
## 12                10               4
## 13                10               8
## 14                 3               2
## 15                 9               1
## 16                 1               4
## 17                 8               1
## 18                 6               8
## 19                 2               6
## 20                 9               7
## 21                 4               6
## 22                 7               8
## 23                 5               3
## 24                 3               5
## 25                 8               4
## 26                 5              10
## 27                 8               8
## 28                 1              10
## 29                 5               6
head(data1)
##   Year Age_Group Gender Smoking_Prevalence Drug_Experimentation
## 1 2024     15-19   Both              18.85                32.40
## 2 2024     10-14 Female              34.88                41.57
## 3 2023     10-14   Both              42.00                56.80
## 4 2024     40-49   Both              33.75                42.90
## 5 2023     15-19   Male              47.90                39.62
## 6 2022     70-79   Male              20.14                47.29
##   Socioeconomic_Status Peer_Influence School_Programs Family_Background
## 1                 High              5             Yes                 1
## 2                 High              6             Yes                10
## 3                 High              6             Yes                 2
## 4               Middle             10              No                 9
## 5                 High              1              No                 2
## 6                 High             10             Yes                 7
##   Mental_Health Access_to_Counseling Parental_Supervision Substance_Education
## 1             5                   No                    4                  No
## 2             5                   No                    9                 Yes
## 3             7                  Yes                    2                  No
## 4             7                  Yes                    2                  No
## 5             4                  Yes                    4                  No
## 6             4                   No                    4                  No
##   Community_Support Media_Influence
## 1                 3               1
## 2                 9               3
## 3                 5               1
## 4                10               9
## 5                10               3
## 6                 4               2

Dataset ini memberikan gambaran lengkap tentang tren merokok dan eksperimen narkoba pada remaja dari tahun ke tahun. Dataset ini mencakup berbagai faktor demografis seperti kelompok umur, jenis kelamin, status sosial ekonomi, dan pengaruh dari keluarga dan teman sebaya.

X1 = data1[,5]
X2 = data1[,10]
data1_fix = data.frame(X1,X2)
data1_fix
##       X1 X2
## 1  32.40  5
## 2  41.57  5
## 3  56.80  7
## 4  42.90  7
## 5  39.62  4
## 6  47.29  4
## 7  26.60  1
## 8  54.67  2
## 9  63.65  6
## 10 17.62  6
## 11 66.66  3
## 12 11.41  3
## 13 19.46  4
## 14 42.47  1
## 15 65.31 10
## 16 62.21  9
## 17 57.28  3
## 18 39.62  4
## 19 22.28  8
## 20 30.66  5
## 21 45.36  3
## 22 50.57  2
## 23 67.80  7
## 24 14.25  6
## 25 15.59  9
## 26 32.20  1
## 27 69.46 10
## 28 18.92 10
## 29 10.85 10
library(MVN)
## Warning: package 'MVN' was built under R version 4.3.3
head(data1_fix)
##      X1 X2
## 1 32.40  5
## 2 41.57  5
## 3 56.80  7
## 4 42.90  7
## 5 39.62  4
## 6 47.29  4
test = mvn(data1_fix, mvnTest = "mardia", univariateTest = "SW", multivariatePlot = "qq")

test
## $multivariateNormality
##              Test         Statistic           p value Result
## 1 Mardia Skewness   3.4470283211295  0.48597837918879    YES
## 2 Mardia Kurtosis -1.29362706590044 0.195794268838087    YES
## 3             MVN              <NA>              <NA>    YES
## 
## $univariateNormality
##           Test  Variable Statistic   p value Normality
## 1 Shapiro-Wilk    X1        0.9387    0.0929    YES   
## 2 Shapiro-Wilk    X2        0.9342    0.0706    YES   
## 
## $Descriptives
##     n      Mean   Std.Dev Median   Min   Max  25th 75th        Skew  Kurtosis
## X1 29 40.188966 18.938908  41.57 10.85 69.46 22.28 56.8 -0.01608223 -1.389012
## X2 29  5.344828  2.918853   5.00  1.00 10.00  3.00  7.0  0.21081617 -1.212950

Berdasarkan hasil uji normal multivariat, data berdistribusi normal karena hasil p value Mardia Skewness dan Mardia Kurtosis lebih alpha (0,05).

## Uji Homogenitas Multivariate 
library(biotools)
## Warning: package 'biotools' was built under R version 4.3.3
## Loading required package: MASS
## ---
## biotools version 4.2
grup <- data1$Gender
head(grup)
## [1] "Both"   "Female" "Both"   "Both"   "Male"   "Male"
boxM(data = data1_fix, grouping = grup)
## 
##  Box's M-test for Homogeneity of Covariance Matrices
## 
## data:  data1_fix
## Chi-Sq (approx.) = 4.1522, df = 6, p-value = 0.6561

P-value lebih besar dari tingkat signifikansi (0,05), data ini homogen

owm = manova(cbind(data1_fix$X1, data1_fix$X2)~data1$Gender[1:29])
summary(owm)
##                    Df  Pillai approx F num Df den Df Pr(>F)
## data1$Gender[1:29]  2 0.18846   1.3524      4     52 0.2632
## Residuals          26

P-value 0.2632 lebih besar dari tingkat signifikansi (0.05), maka ada perbedaan signifikan dalam variabel dependen yang dipertimbangkan berdasarkan jenis kelamin. Dengan kata lain, jenis kelamin tidak memiliki pengaruh yang signifikan terhadap variabel yang dianalisis dalam data ini.

### TWO WAY MANOVA
library(openxlsx)
## Warning: package 'openxlsx' was built under R version 4.3.3
data2 <- read.xlsx("rokokk22.xlsx")
data2
##    Access_to_Counseling Smoking_Prevalence Drug_Experimentation Mental_Health
## 1                     0              18.85                 32.4             5
## 2                     0              34.88                41.57             5
## 3                     1               42.0                 56.8             7
## 4                     1              33.75                 42.9             7
## 5                     1               47.9                39.62             4
## 6                     0              20.14                47.29             4
## 7                     1              38.38                 26.6             1
## 8                     0               7.87                54.67             2
## 9                     1              11.61                63.65             6
## 10                    1              23.98                17.62             6
## 11                    0              42.85                66.66             3
## 12                    1              48.72                11.41             3
## 13                    1              37.71                19.46             4
## 14                    0              44.99                42.47             1
## 15                    0              11.78                65.31            10
## 16                    1              41.94                62.21             9
## 17                    1              49.99                57.28             3
## 18                    1              24.61                39.62             4
## 19                    0              15.08                22.28             8
## 20                    0               15.4                30.66             5
## 21                    0              15.17                45.36             3
## 22                    0              10.49                50.57             2
## 23                    1               9.95                 67.8             7
## 24                    0              26.59                14.25             6
## 25                    1              18.41                15.59             9
## 26                    1               46.0                 32.2             1
## 27                    1               14.8                69.46            10
## 28                    1              12.27                18.92            10
## 29                    1               6.51                10.85            10
##    School_Programs
## 1                1
## 2                1
## 3                1
## 4                0
## 5                0
## 6                1
## 7                0
## 8                1
## 9                1
## 10               0
## 11               0
## 12               0
## 13               1
## 14               0
## 15               0
## 16               1
## 17               1
## 18               0
## 19               1
## 20               1
## 21               1
## 22               1
## 23               1
## 24               1
## 25               0
## 26               0
## 27               0
## 28               1
## 29               1
head(data2)
##   Access_to_Counseling Smoking_Prevalence Drug_Experimentation Mental_Health
## 1                    0              18.85                 32.4             5
## 2                    0              34.88                41.57             5
## 3                    1               42.0                 56.8             7
## 4                    1              33.75                 42.9             7
## 5                    1               47.9                39.62             4
## 6                    0              20.14                47.29             4
##   School_Programs
## 1               1
## 2               1
## 3               1
## 4               0
## 5               0
## 6               1
data2$Smoking_Prevalence <- as.numeric(data2$Smoking_Prevalence)
data2$Drug_Experimentation <- as.numeric(data2$Drug_Experimentation)
x11 <- data2$Smoking_Prevalence
x22 <- data2$Drug_Experimentation
x33 <- data2$Mental_Health
data2_fix <- data.frame(x1=x11, x2=x22, x3=x33);data2_fix
##       x1    x2 x3
## 1  18.85 32.40  5
## 2  34.88 41.57  5
## 3  42.00 56.80  7
## 4  33.75 42.90  7
## 5  47.90 39.62  4
## 6  20.14 47.29  4
## 7  38.38 26.60  1
## 8   7.87 54.67  2
## 9  11.61 63.65  6
## 10 23.98 17.62  6
## 11 42.85 66.66  3
## 12 48.72 11.41  3
## 13 37.71 19.46  4
## 14 44.99 42.47  1
## 15 11.78 65.31 10
## 16 41.94 62.21  9
## 17 49.99 57.28  3
## 18 24.61 39.62  4
## 19 15.08 22.28  8
## 20 15.40 30.66  5
## 21 15.17 45.36  3
## 22 10.49 50.57  2
## 23  9.95 67.80  7
## 24 26.59 14.25  6
## 25 18.41 15.59  9
## 26 46.00 32.20  1
## 27 14.80 69.46 10
## 28 12.27 18.92 10
## 29  6.51 10.85 10
test = mvn(data2_fix, mvnTest = "mardia", univariateTest = "SW", multivariatePlot = "qq")

test
## $multivariateNormality
##              Test        Statistic           p value Result
## 1 Mardia Skewness 10.0454583600137 0.436514161462383    YES
## 2 Mardia Kurtosis -1.5454121752046 0.122246597202847    YES
## 3             MVN             <NA>              <NA>    YES
## 
## $univariateNormality
##           Test  Variable Statistic   p value Normality
## 1 Shapiro-Wilk    x1        0.8981    0.0088    NO    
## 2 Shapiro-Wilk    x2        0.9387    0.0929    YES   
## 3 Shapiro-Wilk    x3        0.9342    0.0706    YES   
## 
## $Descriptives
##     n      Mean   Std.Dev Median   Min   Max  25th  75th        Skew  Kurtosis
## x1 29 26.642069 14.603796  23.98  6.51 49.99 14.80 41.94  0.23383309 -1.581631
## x2 29 40.188966 18.938908  41.57 10.85 69.46 22.28 56.80 -0.01608223 -1.389012
## x3 29  5.344828  2.918853   5.00  1.00 10.00  3.00  7.00  0.21081617 -1.212950

Berdasarkan hasil uji normal multivariat, data berdistribusi normal karena hasil p value Mardia Skewness dan Mardia Kurtosis lebih alpha (0,05).

grop <- data2$Access_to_Counseling
head(grop)
## [1] 0 0 1 1 1 0
boxM(data = data2_fix, grouping = grop)
## 
##  Box's M-test for Homogeneity of Covariance Matrices
## 
## data:  data2_fix
## Chi-Sq (approx.) = 3.1404, df = 6, p-value = 0.791
grup <- data2$School_Programs
head(grup)
## [1] 1 1 1 0 0 1
boxM(data = data2_fix, grouping = grup)
## 
##  Box's M-test for Homogeneity of Covariance Matrices
## 
## data:  data2_fix
## Chi-Sq (approx.) = 11.841, df = 6, p-value = 0.06561

Karena p-value lebih besar dari tingkat signifikansi (0,05), maka data tersebut memenuhi asumsi homogenitas.

## Two Way MANOVA 
Access_to_Counseling <- as.factor(data2$Access_to_Counseling)
School_Programs <- as.factor(data2$School_Programs)
manova <- manova(cbind(x11, x22, x33) ~ Access_to_Counseling * School_Programs, data = data2)
# Menampilkan hasil
summary(manova)
##                                      Df  Pillai approx F num Df den Df  Pr(>F)
## Access_to_Counseling                  1 0.27291  2.87765      3     23 0.05801
## School_Programs                       1 0.10609  0.90988      3     23 0.45156
## Access_to_Counseling:School_Programs  1 0.26078  2.70465      3     23 0.06895
## Residuals                            25                                       
##                                       
## Access_to_Counseling                 .
## School_Programs                       
## Access_to_Counseling:School_Programs .
## Residuals                             
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
  1. Access to Counseling

Nilai p sebesar 0.05801 menunjukkan bahwa ada perbedaan yang signifikan dalam variabel dependen.

  1. School Programs

Nilai p sebesar 0.45156 menunjukkan tidak ada perbedaan signifikan dalam variabel dependen.

  1. Access_to_Counseling:School_Programs

Nilai p sebesar 0.06895 menunjukkan adanya untuk interaksi antara Access to Counseling dan School Programs.