R Commander is used to ___________ data in R.

What function is used to create data frames?

What will be the output when executing log(-3.1) in the R console?

One way to pass data around in R is by de-serializing the R object with _____.

What will be the data type of the vector if you concatenate a number and NA?

Accessing elements in a data structure is achieved through a process called ________

The most convenient way to use R is at a graphics workstation running a windowing system.

What will be the output of the following R code?

x <- c(3, 7, NA, 4, 7)
y <- c(5, NA, 1, 2, 2)
x + y

Which of the following R functions produces the variance-covariance matrix?

What is done to curvilinear relationships in linear regression?