condition mean min max ZT0-3 66.3272 32.95175 90.8345 ZT4-7 34.7809 34.7809 34.7809 ZT8-11 57.152649999999994 57.152649999999994 57.152649999999994 ZT12-15 78.479675 73.22565 83.7337 ZT16-19 93.64965000000001 93.64965000000001 93.64965000000001 ZT20-23 121.684 121.684 121.684