References/Notes/Attributions:
Source
Introduction to Mathematical Statistics and its Applications by Richard J. Larsen and Morris L. Marx. Prentice Hall:Englewood Cliffs, NJ, 1986.
References
The original discussion of the study is in Blackman, S., and Catalina, D. (1973). "The moon and the emergency room." Perceptual and Motor Skills 37, 624-626.