diff --git a/model-building.Rmd b/model-building.Rmd
index 4b47e71..ba65eef 100644
--- a/model-building.Rmd
+++ b/model-building.Rmd
@@ -295,7 +295,7 @@ I think this is fine to do provided that you've carefully checked that the funct
     How would these days generalise to another year?
 
     ```{r}
-    daily %>% filter(n_resid2 > 80)
+    daily %>% filter(resid > 80)
     ```
 
 1.  Create a new variable that splits the `wday` variable into terms, but only