condition mean min max ZT0-3 46.83265 45.552400000000006 48.112899999999996 ZT4-7 43.9725 43.9725 43.9725 ZT8-11 42.40205 42.40205 42.40205 ZT12-15 0 0 0 ZT16-19 46.4278 46.4278 46.4278 ZT20-23 49.4269 49.4269 49.4269