
Dear R-User,

I met the problem to test equality of variance.

Two sample units:
conjps<-c(9.41,10.45,10.78,10.73,11.11,11.12,11.59,11.04,11.63)

ms<-c(4.11,5.10,5.70,6.46,6.04,6.16, 6.24,6.32,7.33)

Then I use the F test to test:



•Test Equality
of
Two Variances

 F
test to compare two variances



data: 
conjps and ms 

F = 0.5419, num df = 8,
denom df = 8,
p-value = 0.4045

alternative hypothesis: true ratio of
variances is not equal to 1 

95 percent confidence interval:

 0.1222368 2.4024170 

sample estimates:

ratio of variances 

        
0.5419076 


but If conjps is replaced by conjps1: shifting the first value and the last value position
conjps1<-c(11.36,10.45,10.78,10.73,11.11,11.12,11.59,11.04,9.41)

I do believe we get the same result when testing the equity of variance. but how do I distringuish this two cases by testing?
Kind regards,Tammy



 		 	   		  
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