condition mean min max ZT0-3 11681.17804 11681.17804 11681.17804 ZT4-7 11619.516705 11619.516705 11619.516705 ZT8-11 12382.947515 12382.947515 12382.947515 ZT12-15 12266.87464 12266.87464 12266.87464 ZT16-19 11920.613035 11920.613035 11920.613035 ZT20-23 11452.62442 11452.62442 11452.62442