condition mean min max ZT0-3 253.47112 253.47112 253.47112 ZT4-7 271.426064 271.426064 271.426064 ZT8-11 426.5202385 426.5202385 426.5202385 ZT12-15 537.4645575 537.4645575 537.4645575 ZT16-19 378.859378 378.859378 378.859378 ZT20-23 310.679144 310.679144 310.679144