Normalna porazdelitev

qnorm(p = 0.025, 
      lower.tail = TRUE)
## [1] -1.959964
qnorm(p = 0.025, 
      lower.tail = FALSE)
## [1] 1.959964

t-porazdelitev

qt(p = 0.025, 
   df = 30, 
   lower.tail = TRUE)
## [1] -2.042272
qt(p = 0.025, 
   df = 30, 
   lower.tail = FALSE)
## [1] 2.042272

Hi-kvadrat porazdelitev

qchisq(p = 0.05, 
       df = 1, 
       lower.tail = FALSE)
## [1] 3.841459

F-porazdelitev

qf(p = 0.05, 
   df1 = 10,
   df2 = 5, 
   lower.tail = FALSE)
## [1] 4.735063