backticks $()$ tollowed by an $"$r eenclosed in braces, then the additional three backticks to clos the chunk, or simply press the button from the menu on the far right of the toolbar on top of the file editor.n $*6.$ Datasets for the labs are contained within the package. To view which datasets are included in the package, go to the "Packages" tab and scroll down to ; clicking the blue hyperlink opens the documenntation page that lists the datasets included in the package.

$7.$ The following code chunks use data included in the package. To load the package, we use the $\backslash$texttt$\{$library$()\}$ command, it is already written in the code chunk below for you. This command only needs to be used once in a document, in the first $R_8$ chunk that requires data from the package. The $\frac{\frac{?}{?}}{t}$exttt$\{data()\}$ command can be used to load a particular dataset from the package; once the command is run, the name of the dataset will appear in the Environment tab.

$123$

$124*cdots\{r\}$

$125$ library$($openintro$)$ #loads the package

$126$ data$($lizard$\_$run$)$ #loads the lizard speeds dataset

$127$ mean$($lizard$\_$run$top$\_$speed$)$

$128$

$129$

$130$

$8.$ It is also possible to view the output of a code chunk without having to the entire document.