condition mean min max ZT0-3 76.117578 76.117578 76.117578 ZT4-7 84.0326115 84.0326115 84.0326115 ZT8-11 93.544209 93.544209 93.544209 ZT12-15 83.74573749999999 83.74573749999999 83.74573749999999 ZT16-19 94.268187 94.268187 94.268187 ZT20-23 106.90600549999999 106.90600549999999 106.90600549999999