condition mean min max ZT0-3 94.088364 94.088364 94.088364 ZT4-7 123.518475 123.518475 123.518475 ZT8-11 121.4543555 121.4543555 121.4543555 ZT12-15 135.11146300000001 135.11146300000001 135.11146300000001 ZT16-19 115.5530195 115.5530195 115.5530195 ZT20-23 129.383204 129.383204 129.383204