condition mean min max ZT0-3 156.983775 156.983775 156.983775 ZT4-7 214.637405 214.637405 214.637405 ZT8-11 170.578211 170.578211 170.578211 ZT12-15 183.176607 183.176607 183.176607 ZT16-19 183.719618 183.719618 183.719618 ZT20-23 181.39567449999998 181.39567449999998 181.39567449999998