meaning for 误差 wùchā:

  • - difference
  • - error
  • - inaccuracy

cǐxiàng此项
diàochá调查
de
wùchā误差
qūjiān区间
wèi
zhèngfù正负
5
bǎifēndiǎn百分点

The survey's margin of error was plus or minus 5 percent.