To evaluate a classifier, one compares its output to another reference classification ideally a perfect classification, but in practice the output of another cross tabulates the data into a 2? contingency table, comparing the two classifications.
32.
They studied the birth records to identify the effects of multiple birth, birth order, age of parents and the sexes of preceding siblings on the proportion of males using contingency tables, chi-squared tests and regression analysis.
33.
The MFA and its extensions ( hierarchical MFA, MFA on contingency tables, etc . ) are a research topic of applied mathematics laboratory Agrocampus ( LMA ?) which published a book presenting basic methods of exploratory multivariate analysis.
34.
These can be arranged into a 2? contingency table, with columns corresponding to actual value condition positive ( CP ) or condition negative ( CN ) and rows corresponding to classification value test outcome positive or test outcome negative.
35.
The closer a result from a contingency table is to the upper left corner, the better it predicts, but the distance from the random guess line in either direction is the best indicator of how much predictive power a method has.
36.
To reduce the error in approximation, Frank Yates suggested a correction for continuity that adjusts the formula for Pearson's chi-squared test by subtracting 0.5 from the difference between each observed value and its expected value in a contingency table.
37.
That is, would you consider only those which both started and ended in A or B ( suggesting Fisher's exact test ) or would your consider enlarging the implicit contingency table to include C ( implying a higher dimension generalization of FET )?
38.
It is a special kind of contingency table, with two dimensions ( " actual " and " predicted " ), and identical sets of " classes " in both dimensions ( each combination of dimension and class is a variable in the contingency table ).
39.
It is a special kind of contingency table, with two dimensions ( " actual " and " predicted " ), and identical sets of " classes " in both dimensions ( each combination of dimension and class is a variable in the contingency table ).
40.
Similarly, the result of Bayesian inference applied to a choice of single multinomial distribution for all rows of the contingency table taken together versus the more general alternative of a separate multinomial per row produces results very similar to the " G " statistic.
