品管data
#7.4
x<-c(8,1,3,0,2,4,0,1,10,6
6,0,4,0,3,1,15,2,3,0)
#7.13
x<-c(10,15,31,18,24,12,23,15,8,8)
#7.21
x<-c(6,8,9,7,3,4,2,1,0,2,
1,0,1,4,5,3,10,4,7,6)
n<-c(200,250,250,250,200,200,150,150,150,150,
100,100,100,200,200,200,200,200,250,250)
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