condition mean min max ZT0-3 142.113647 142.113647 142.113647 ZT4-7 104.361907 104.361907 104.361907 ZT8-11 109.31618 109.31618 109.31618 ZT12-15 119.9456755 119.9456755 119.9456755 ZT16-19 155.01257049999998 155.01257049999998 155.01257049999998 ZT20-23 122.86551850000001 122.86551850000001 122.86551850000001