Knowledge Quiz: Add-On Packages

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Which of the following commands will install the lavaan package from CRAN?

install.packages("dplyr", repos = "https://cloud.r-project.org")library(lavaan)install.packages("lavaan", repos = "https://cloud.r-project.org")help(lavaan)install.packages("lavaan")

• Wrong: Installing dplyr
• Wrong: Loading the package, not installing
• Correct: Explicitly specifying the CRAN mirror to use
• Wrong: Accessing the help file for the lavaan() function
• Correct: The simple case