condition mean min max ZT0-3 0.62211125 0.5524910000000001 0.6917314999999999 ZT4-7 0.736446 0.736446 0.736446 ZT8-11 0.47953 0.47953 0.47953 ZT12-15 0 0 0 ZT16-19 0.652443 0.652443 0.652443 ZT20-23 0.616942 0.616942 0.616942