IIRなどを読んでいると， true positive, false positive, true negative, false negative, たつをの ChangeLog 20080622 にもありますが，true / falseが分かりづらい． positive / negative は推測結果で，まだ分かりやすい．医療の病気の判定における陽性…

Evelyone pls check my answers and my English. Exercise 8.1 Precision=8/(8+10)=.444 Recall==8/20=.4 Exercise 8.2 Better harmonic mean has better max-min{precision,recall} than arithmetic mean. Exercise 8.3 1. beta^2=(1-alpha)/alpha 2. alpha…