Intro to R and RStudio

What is R?

• A programming language for data analysis and statistics

• A type of statistical test

• A type of spreadsheet software

• A hardware device

What does RStudio help you do?

• Play video games

• Write and run R code more easily

• Design websites

• Analyze images

What is the default file extension for an R script?

• .r

• .rs

• .txt

• .csv

Which of these is NOT a feature of RStudio?

• A script editor

• A console

• A built-in email client

• A file viewer

What is the CRAN repository used for?

• Storing datasets

• Sharing R packages

• Writing scripts

• Generating random numbers

How can you run a line of R code in RStudio?

• By clicking "Run" or pressing Ctrl+Enter (Cmd+Enter on Mac)

• By double-clicking the line

• By opening a terminal

• By saving the script

What does the install.packages() function do in R?

• Installs a new RStudio theme

• Installs additional tools for R

• Installs RStudio updates

• Installs a new dataset

What is the output of this command: 1 + 2 * 3?

• 9

• 7

• 6

• 5

What does the summary() function in R do?

• Summarizes the code in your script

• Creates a table of descriptive statistics for data

• Predicts future trends in data

• Visualizes data

Why is R popular among data analysts and statisticians?

• It has a large library of packages for analysis and visualization

• It is free and open-source

• It allows reproducible research through RMarkdown

• All of the above