You Have Been Invited to Give a Special Address at the Joint

Multiple Choice

You have been invited to give a special address at the Joint Statistics Meeting on your research area.You are allotted 1 hour to give your talk.You practice your talk many times in order to make sure it is perfect and within the time constraints.What is the common cause variation for the length of the talk?

A) The variation in the length of the talk caused by you intentionally speaking quickly in a few of your practice sessions so that you can finish the talk in order to attend an impromptu meeting
B) The variation in the length of the talk caused by variation in the speed with which you talk and the amount of words used during each practice session
C) All of the above
D) None of the above