condition mean min max ZT0-3 69.0298976225 57.687952335 80.37184291 ZT4-7 97.27239855166667 95.84976059333333 98.69503651000001 ZT8-11 94.027932575 92.960056 95.09580915000001 ZT12-15 94.86407123000001 92.32568059666667 97.40246186333333 ZT16-19 95.78059238 93.07373562 98.48744914 ZT20-23 84.63560571833334 84.09474966666667 85.17646177