condition mean min max ZT0-3 0.45198625 0.3652535 0.538719 ZT4-7 0.779618 0.779618 0.779618 ZT8-11 0.887732 0.887732 0.887732 ZT12-15 0 0 0 ZT16-19 0.8827929999999999 0.8827929999999999 0.8827929999999999 ZT20-23 0.7072499999999999 0.7072499999999999 0.7072499999999999