condition mean min max ZT0-3 98.13535 86.2167 110.054 ZT4-7 65.32595 65.32595 65.32595 ZT8-11 156.5455 156.5455 156.5455 ZT12-15 0 0 0 ZT16-19 160.34300000000002 160.34300000000002 160.34300000000002 ZT20-23 118.5305 118.5305 118.5305