Definition of knack for Students. 1  1 : a natural ability : talent She has a knack for making friends. 2  2 : a clever or skillful way of doing something : trick Skating is easy once you get the knack.
Brazil - GINI index. GINI index (World Bank estimate) The value for GINI index (World Bank estimate) in Brazil was 52.87 as of 2013. As the graph below shows, over the past 32 years this indicator reached a maximum value of 63.30 in 1989 and a minimum value of 52.67 in 2012.
No, despite their names they are not equivalent or even that similar. 1  Gini impurity is a measure of misclassification, which applies in a multiclass classifier context. 2  Gini coefficient applies to binary classification and requires a classifier that can in some way rank examples according to the likelihood of being in a positive class.