Iris

Mean sd 0% 25% 50% 75% 100% n

Iris setosa 5.00 0.3524897 4.3 4.800 5.0 5.2 5.8 50

Iris versicolor 5.936 0.5161711 4.9 5.600 5.9 6.3 7.0 50

Iris virginica 6.588 0.6358796 4.9 6.225 6.5 6.9 7.9 50

1. Uji Homosdastisitas2xSD iris setosa (0,70) > SD iris virginica (0,63) sifat data homosdastisitas

2. Uji Normalitas

> Anova(sepal.length.by.species, type="II")

Anova Table (Type II tests)

Response: sepal.length

Sum Sq Df F value Pr(>F)

species 63.212 2 119.26 < 2.2e-16 ***

Residuals 38.956 147

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Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1

Hipotesis

μ 1= iris setosa

μ2 = iris versicolor

μ 3 = iris virginica

H0 = μ 1=μ2=μ 3

HA = μ 1 ≠ μ 2≠ μ 3

H0 ditolak. Panjang sepal masing-masing berbeda. Ada perbedaam panjang sepal dari masing-masing spesies

> TukeyHSD(aov(sepal.length.by.species))

Tukey multiple comparisons of means

95% family-wise confidence level

Fit: aov(formula = sepal.length.by.species)

$species

diff lwr upr p adj

Iris versicolor-Iris setosa 0.930 0.6862273 1.1737727 0

Iris virginica-Iris setosa 1.582 1.3382273 1.8257727 0

Iris virginica-Iris versicolor 0.652 0.4082273 0.8957727 0

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