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withincv
2009 Sep 09
1
Stats help with calculating between and within subject variance and confidence intervals
...tal # Total Variance
[1] 0.713375
> betweenCV<-sqrt(between)/grandmean * 100 # Between Machine CV%
> withinCV<-sqrt(within)/grandmean * 100 # Within Machine CV%
> totalCV<-sqrt(total)/grandmean * 100 # Total CV%
> #within confidence intervals (Chi Squared Method)
> withinLCB<-within/qf(1-a,8,Inf) # Within LCB
> withinUCB<-within/qf(a,8,Inf) # Within UCB
> #Between Confidence Intervals (Modified Large Sample Method)
> n1<-dfMachine
> n2<-dfWithin
> G1<-1-(1/qf(1-a,n1,Inf)) # According to Burdick and Graybill this
should be a
&g...