Cancelled flights exercise

Fixes #117
2016-07-22 11:16:50 -05:00 · 2016-07-22 11:16:50 -05:00 · 37058ce630
parent 1c9d8974f4
commit 37058ce630
1 changed files with 3 additions and 0 deletions
--- a/transform.Rmd
+++ b/transform.Rmd
@ -813,6 +813,9 @@ daily %>%
    
    Which is more important: arrival delay or departure delay?

+1.  Our definition of cancelled flights (`!is.na(dep_delay) & !is.na(arr_delay)`
+    ) is slightly sup-optimal. Why? Which is the most important column?
+
 1.  Look at the number of cancelled flights per day. Is there a pattern?
    Is the proportion of cancelled flights related to the average delay?