condition mean min max ZT0-3 1307.219455 1307.219455 1307.219455 ZT4-7 1323.266103 1323.266103 1323.266103 ZT8-11 1237.7937755 1237.7937755 1237.7937755 ZT12-15 1270.810428 1270.810428 1270.810428 ZT16-19 1162.0104135000001 1162.0104135000001 1162.0104135000001 ZT20-23 1121.3834145 1121.3834145 1121.3834145