Which function opens the screen graphics device for the Mac? 

The with() function is used to apply an expression for a given dataset.

Which operator is used to connect multiple verb actions together into a pipeline?

 Which of the following lets you build interactive Flash or HTML5 charts?

Pick the output of the code snippet.

> x <- 3
> switch(2, 2+2, mean(1:10), rnorm(5))

The ________ function can be used to add datasets in R, provided that the columns in the datasets are the same.

Parallel processing is done via a parallel package that can make the elapsed time smaller than the user time.

Which of the following syntax is used to install the forecast package?

Which of the following functions can be used to read CSV files in R?

 What will be the output of the following R code? 

> centre <- function(x, type) {
+ switch(type,
+        mean = mean(x),
+        median = median(x),
+        trimmed = mean(x, trim = .1))
+ }
> x <- rcauchy(10)
> centre(x, "mean")