condition mean min max ZT0-3 3413.5 3413.5 3413.5 ZT4-7 3739.6 3739.6 3739.6 ZT8-11 3870.4 3870.4 3870.4 ZT12-15 3882.8999999999996 3882.8999999999996 3882.8999999999996 ZT16-19 3444.55 3444.55 3444.55 ZT20-23 3478.2 3478.2 3478.2