condition mean min max ZT0-3 0.56628725 0.392316 0.7402584999999999 ZT4-7 0.6101305 0.6101305 0.6101305 ZT8-11 0.38979650000000005 0.38979650000000005 0.38979650000000005 ZT12-15 0 0 0 ZT16-19 0.7362489999999999 0.7362489999999999 0.7362489999999999 ZT20-23 0.352394 0.352394 0.352394