condition mean min max ZT0-3 3.4426978195 2.546834329 4.33856131 ZT4-7 3.6708601195000004 3.6689465180000003 3.672773721 ZT8-11 4.2013892305 3.6738071234999996 4.7289713375 ZT12-15 4.667008144 4.2066453565 5.1273709315 ZT16-19 4.78466342125 3.969072174 5.6002546685 ZT20-23 9.262587639 7.935252241500001 10.5899230365