ref: cb5a3fb8adad1c7f32d4d7ea26f01fa7078829ea
dir: /stt/db/
2.5 1 1541980172 1542066572 arithmeticmean.ms 2.5 1 1541980172 1542066572 variance.ms 2.5 1 1541980172 1542066572 variance.2.ms 2.5 1 1541980172 1542066572 stddeviation.ms 2.5 1 1541980172 1542066572 variancedist.ms 2.5 1 1541980172 1542066572 variancedist.2.ms