condition mean min max ZT0-3 0.56586975 0.461992 0.6697474999999999 ZT4-7 1.79557 1.79557 1.79557 ZT8-11 0.888809 0.888809 0.888809 ZT12-15 0 0 0 ZT16-19 0.9803870000000001 0.9803870000000001 0.9803870000000001 ZT20-23 0.221462 0.221462 0.221462