condition mean min max ZT0-3 155.7295 155.7295 155.7295 ZT4-7 136.305 136.305 136.305 ZT8-11 139.30849999999998 139.30849999999998 139.30849999999998 ZT12-15 159.5505 159.5505 159.5505 ZT16-19 182.48250000000002 182.48250000000002 182.48250000000002 ZT20-23 174.2835 174.2835 174.2835