condition mean min max ZT0-3 395.362482 395.362482 395.362482 ZT4-7 502.9243645 502.9243645 502.9243645 ZT8-11 686.5834440000001 686.5834440000001 686.5834440000001 ZT12-15 644.5310655000001 644.5310655000001 644.5310655000001 ZT16-19 454.7722585 454.7722585 454.7722585 ZT20-23 440.5499645 440.5499645 440.5499645