condition mean min max ZT0-3 285.462826 285.462826 285.462826 ZT4-7 263.6022525 263.6022525 263.6022525 ZT8-11 302.246981 302.246981 302.246981 ZT12-15 291.7650905 291.7650905 291.7650905 ZT16-19 387.05018 387.05018 387.05018 ZT20-23 396.9420105 396.9420105 396.9420105