Variables:
                    This data frame contains the following columns:
	- move
 
	- 
	
a binary numeric vector coded for patient movement (0 = no movement, 1 = movement)
	 
	- conc
 
	- 
	
anesthetic concentration
	 
	- logconc
 
	- 
	
logarithm of concentration
	 
	- nomove
 
	- 
	
the complement of move
	 
 
Details
The interest is in estimating how the probability of jerking or twisting varies with increasing concentration of the anesthetic agent.