condition mean min max ZT0-3 11.528749999999999 11.528749999999999 11.528749999999999 ZT4-7 11.105385 11.105385 11.105385 ZT8-11 8.62453 8.62453 8.62453 ZT12-15 9.47127 9.47127 9.47127 ZT16-19 12.5866 12.5866 12.5866 ZT20-23 10.92225 10.92225 10.92225