condition mean min max ZT0-3 205.119111 205.119111 205.119111 ZT4-7 222.457427 222.457427 222.457427 ZT8-11 289.460728 289.460728 289.460728 ZT12-15 297.0354635 297.0354635 297.0354635 ZT16-19 359.1001975 359.1001975 359.1001975 ZT20-23 344.886928 344.886928 344.886928