condition mean min max ZT0-3 25.21295 25.21295 25.21295 ZT4-7 24.669150000000002 24.669150000000002 24.669150000000002 ZT8-11 20.14425 20.14425 20.14425 ZT12-15 17.30065 17.30065 17.30065 ZT16-19 23.9096 23.9096 23.9096 ZT20-23 24.6231 24.6231 24.6231