diff --git a/data-transform.qmd b/data-transform.qmd
index 12a4202..0614450 100644
--- a/data-transform.qmd
+++ b/data-transform.qmd
@@ -471,7 +471,7 @@ There are five handy functions that allow you pick off specific rows within each
 -   `df |> slice_tail(n = 1)` takes the last row in each group.
 -   `df |> slice_min(x, n = 1)` takes the row with the smallest value of `x`.
 -   `df |> slice_max(x, n = 1)` takes the row with the largest value of `x`.
--   `df |> slice_sample(x, n = 1)` takes one random row.
+-   `df |> slice_sample(n = 1)` takes one random row.
 
 You can vary `n` to select more than one row, or instead of `n =`, you can use `prop = 0.1` to select (e.g.) 10% of the rows in each group.
 For example, the following code finds the most delayed flight to each destination: