condition mean min max ZT0-3 24.766350000000003 24.041150000000002 25.49155 ZT4-7 16.4295 16.4295 16.4295 ZT8-11 20.103650000000002 20.103650000000002 20.103650000000002 ZT12-15 0 0 0 ZT16-19 31.18025 31.18025 31.18025 ZT20-23 29.1147 29.1147 29.1147