condition mean min max ZT0-3 13.844453 13.844453 13.844453 ZT4-7 11.939811500000001 11.939811500000001 11.939811500000001 ZT8-11 14.705745 14.705745 14.705745 ZT12-15 14.981589999999999 14.981589999999999 14.981589999999999 ZT16-19 11.6353595 11.6353595 11.6353595 ZT20-23 10.863302000000001 10.863302000000001 10.863302000000001