However, we also found substantial error in the other direction: more than 40 percent of cases involved the parent reporting more income or fewer persons in the household than they should have. (educationnext.org)
If value - added scores are measured with substantial error, a claim that a teacher lies, say, in the lowest 25 percentile of all teachers is also vulnerable to error. (carnegieknowledgenetwork.org)
«the last glacial period is a good example of a large forcing (~ 7 W / m ^ 2 from ice sheets, greenhouse gases, dust and vegetation) giving a large temperature response (~ 5 ºC) and implying a sensitivity of about 3ºC (with substantial error bars).» (realclimate.org)