condition mean min max ZT0-3 287.2 287.2 287.2 ZT4-7 329.6 329.6 329.6 ZT8-11 296.70000000000005 296.70000000000005 296.70000000000005 ZT12-15 278.65 278.65 278.65 ZT16-19 292.65 292.65 292.65 ZT20-23 294.05 294.05 294.05