shithub: sm2

ref: 96450e57a97c0b55a3639cbe2931b7e0c854e221
dir: /stt/variancedist.t/

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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