The results shown in the table suggest
a) a main effect of time of day.
b) a main effect of drug dose.
c) an interaction of time of day and drug dose.
d) a complex outcome that requires additional research to understand.
Question 2
Which of the following should be included on a cover letter to an editor when submitting a manuscript for publication?
a. if the manuscript has been presented at a scientific meeting
b. statement verifying ethical treatment of participants
c. your name, phone number, and email address
d. all of the above