ref: 8bc45b01287bbcd840c1ce5fc3597245a45b4a6b
dir: /stt/variancedist.t/
For many types of applications, the interval containing about two thirds of the observations is... .Bp For many types of applications, the interval containing about two thirds of the observations is: .EQ left [ X highbar - s ; X highbar + s right ] .EN