Edgar Anderson’s Iris Data
Melanie Bosch
There were 150 observations of 5 different measurements.
There are 150 observations, within 5 different sectors, leading to 750 values.600 of thse values are all numerical, both interval and ratio, under the categoes Sepal length, Sepal Width, Petal Length, and Petal Width. There are 150 observations that are qualitative and fall under three subcategories under the category of Species.Sepal length, sepal width, petal length, and petal width, are all continuous variables, and the species wouldbe considered discrete.
Out of the 5 variables, one would be considered categorical. This would be Species, with 150 values corresponding to the 150 observations. There are 3 levels within Species which are: setosa, versicolor, and viginica.
install.packages(“psych”)
library(psych)
describe(iris)## vars n mean sd median trimmed mad min max range skew
## Sepal.Length 1 150 5.84 0.83 5.80 5.81 1.04 4.3 7.9 3.6 0.31
## Sepal.Width 2 150 3.06 0.44 3.00 3.04 0.44 2.0 4.4 2.4 0.31
## Petal.Length 3 150 3.76 1.77 4.35 3.76 1.85 1.0 6.9 5.9 -0.27
## Petal.Width 4 150 1.20 0.76 1.30 1.18 1.04 0.1 2.5 2.4 -0.10
## Species* 5 150 2.00 0.82 2.00 2.00 1.48 1.0 3.0 2.0 0.00
## kurtosis se
## Sepal.Length -0.61 0.07
## Sepal.Width 0.14 0.04
## Petal.Length -1.42 0.14
## Petal.Width -1.36 0.06
## Species* -1.52 0.07unique(iris$Species)## [1] setosa versicolor virginica
## Levels: setosa versicolor virginicasummary(iris)## Sepal.Length Sepal.Width Petal.Length Petal.Width
## Min. :4.300 Min. :2.000 Min. :1.000 Min. :0.100
## 1st Qu.:5.100 1st Qu.:2.800 1st Qu.:1.600 1st Qu.:0.300
## Median :5.800 Median :3.000 Median :4.350 Median :1.300
## Mean :5.843 Mean :3.057 Mean :3.758 Mean :1.199
## 3rd Qu.:6.400 3rd Qu.:3.300 3rd Qu.:5.100 3rd Qu.:1.800
## Max. :7.900 Max. :4.400 Max. :6.900 Max. :2.500
## Species
## setosa :50
## versicolor:50
## virginica :50
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