brief 0
#Simulation of 3 variable problem with interactions and squared terms
#Design matrix must be in c2-c4. Response will go in c1.
#by PGMathews 2/22/95 for Minitab V8

let c1=88+14*c2-8*c3+11*c4-3*c2*c3+12*c2*c4-2*c3*c4+4*c2*c2-8*c3*c3	#the equation
let k1=count(c2)		#number of runs

random k1 c5;			#random noise
   normal 0 3.			#mean 0 and standard deviation/error

let c1=c1+c5			#put the noise on the signal
erase c5			#get rid of the evidence
brief