From 164172d32a85a9774453be66882543a30ec91395 Mon Sep 17 00:00:00 2001
From: Pooya Taherkhani <pt376511@ohio.edu>
Date: Mon, 8 Feb 2021 10:29:21 -0600
Subject: [PATCH] Drop na.rm=TRUE when data is already purged of NAs (#811)

In transform.Rmd (Chapter 5, Data Transformation), under Counts (5.6.3),
we removed na.rm = TRUE when computing mean because all NAs for
arr_delay were already removed when creating not_cancelled dataset.
---
 transform.Rmd | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/transform.Rmd b/transform.Rmd
index 4dcc444..663aa99 100644
--- a/transform.Rmd
+++ b/transform.Rmd
@@ -592,7 +592,7 @@ The story is actually a little more nuanced. We can get more insight if we draw
 delays <- not_cancelled %>% 
   group_by(tailnum) %>% 
   summarise(
-    delay = mean(arr_delay, na.rm = TRUE),
+    delay = mean(arr_delay),
     n = n()
   )