#< ignore
```{r "Create problem set files"}
# Change working directory
setwd("C:/folder_of_this_solution_file")
ps.name = "SmallExample"; sol.file = paste0(ps.name,"_sol.Rmd")
libs = NULL # character vector of all packages you load in the problem set
create.ps(sol.file=sol.file, ps.name=ps.name, user.name=NULL,libs=libs)
```
#>

## Exercise 1 -- Summary statistics

a) We often want to compute some summary statistic of a vector.
For example:

```{r}
#< task
x = 10:20
# Computing the sum of x
sum(x)
#>
```

Now compute the mean of x.

```{r}
mean(x)
```