The iris dataset contains measurements on 150 flowers of three different species.
Load the iris dataset.
data("iris")
View the iris dataset like a spreadsheet.
View(iris)
Use ggplot2 to create a scatter plot to compare the Petal.Length (x-axis) and Petal.Width (y-axis)
ggplot(iris, aes(x=Petal.Length, y=Petal.Width)) + geom_point()
Test for a correlation between Petal.Length and Petal.Width in the iris dataset, saving the result to a variable called ct
cor.test(iris$Petal.Length, iris$Petal.Width)
Extract the estimate of the correlation from your "ct" object
ct$estimate
Extract the p-value for correlation from your "ct" object
ct$p.value
Extract a 95% confidence interval for the correlation coefficient from your "ct" object
ct$conf.int