condition mean min max ZT0-3 176.532914 176.532914 176.532914 ZT4-7 197.113202 197.113202 197.113202 ZT8-11 174.956435 174.956435 174.956435 ZT12-15 214.11247450000002 214.11247450000002 214.11247450000002 ZT16-19 132.897561 132.897561 132.897561 ZT20-23 159.50987550000002 159.50987550000002 159.50987550000002