condition mean min max ZT0-3 263.267 263.267 263.267 ZT4-7 216.121 216.121 216.121 ZT8-11 282.3985 282.3985 282.3985 ZT12-15 222.85 222.85 222.85 ZT16-19 346.5545 346.5545 346.5545 ZT20-23 278.095 278.095 278.095