condition mean min max ZT0-3 17.251775000000002 16.658450000000002 17.845100000000002 ZT4-7 13.7546 13.7546 13.7546 ZT8-11 11.359024999999999 11.359024999999999 11.359024999999999 ZT12-15 0 0 0 ZT16-19 19.30705 19.30705 19.30705 ZT20-23 14.01785 14.01785 14.01785