condition mean min max ZT0-3 12.706949999999999 12.706949999999999 12.706949999999999 ZT4-7 11.819600000000001 11.819600000000001 11.819600000000001 ZT8-11 11.352 11.352 11.352 ZT12-15 14.119399999999999 14.119399999999999 14.119399999999999 ZT16-19 16.36435 16.36435 16.36435 ZT20-23 14.00695 14.00695 14.00695