condition mean min max ZT0-3 324.5505 324.5505 324.5505 ZT4-7 282.491 282.491 282.491 ZT8-11 263.634 263.634 263.634 ZT12-15 248.2575 248.2575 248.2575 ZT16-19 276.60249999999996 276.60249999999996 276.60249999999996 ZT20-23 323.98249999999996 323.98249999999996 323.98249999999996