condition mean min max ZT0-3 189.261136 189.261136 189.261136 ZT4-7 200.9948495 200.9948495 200.9948495 ZT8-11 201.0379665 201.0379665 201.0379665 ZT12-15 148.29573 148.29573 148.29573 ZT16-19 120.535693 120.535693 120.535693 ZT20-23 101.089523 101.089523 101.089523