condition mean min max ZT0-3 192.674002 192.674002 192.674002 ZT4-7 148.48389350000002 148.48389350000002 148.48389350000002 ZT8-11 162.95213999999999 162.95213999999999 162.95213999999999 ZT12-15 124.535314 124.535314 124.535314 ZT16-19 114.061491 114.061491 114.061491 ZT20-23 87.9429025 87.9429025 87.9429025