condition mean min max ZT0-3 707.693595 707.693595 707.693595 ZT4-7 690.468008 690.468008 690.468008 ZT8-11 267.052253 267.052253 267.052253 ZT12-15 216.07637749999998 216.07637749999998 216.07637749999998 ZT16-19 478.999921 478.999921 478.999921 ZT20-23 1505.385552 1505.385552 1505.385552