condition mean min max ZT0-3 290.95631 290.95631 290.95631 ZT4-7 53.9919995 53.9919995 53.9919995 ZT8-11 54.368923499999994 54.368923499999994 54.368923499999994 ZT12-15 66.8262305 66.8262305 66.8262305 ZT16-19 88.363916 88.363916 88.363916 ZT20-23 94.8125215 94.8125215 94.8125215