Making the world better, one answer at a time. the last eruption was in Iceland 2010.It also happened to cause airplane traffic and shut down multiple flights near western Europe, eastern north America, and north west Asia.
biased statistic. (statistics). A statistic whose expected value, as obtained from a random sampling, does not equal the parameter or quantity being estimated. 1  Facebook. 2  Twitter.
Predictive-validity bias (or bias in criterion-related validity) refers to a testâs accuracy in predicting how well a certain student group will perform in the future. For example, a test would be considered âunbiasedâ if it predicted future academic and test performance equally well for all groups of students.