condition mean min max ZT0-3 13.589749999999999 13.589749999999999 13.589749999999999 ZT4-7 10.507855 10.507855 10.507855 ZT8-11 11.52385 11.52385 11.52385 ZT12-15 12.3439 12.3439 12.3439 ZT16-19 15.26215 15.26215 15.26215 ZT20-23 14.25395 14.25395 14.25395