No campo da Matemática, existem diversas medidas e ferramentas que podem ser utilizadas para avaliar a capacidade de generalização de um modelo, o que representa fazer predições corretas utilizando um novo conjunto de dados. Dessas ferramentas, pode-se destacar: (a) acurácia; (b) taxa de erro; (c) matriz de confusão e; (d) Receiver Operating Characteristic (ROC) ou algoritmo por ordem de grandeza. Assinale a alternativa correta que demonstra a fórmula da taxa de erro. a. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 1 to n of I left parenthesis x subscript i equals f with hat on top left parenthesis y subscript i right parenthesis right parenthesis b. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 1 to n of I left parenthesis y subscript i not equal to f with hat on top left parenthesis x subscript i right parenthesis right parenthesis c. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 1 to n of I left parenthesis y subscript i equals f with hat on top left parenthesis x subscript i right parenthesis right parenthesis d. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 0 to n of I left parenthesis y subscript i not equal to f with hat on top left parenthesis x subscript i right parenthesis right parenthesis e. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 1 to n of I left parenthesis x subscript i not equal to f with hat on top left parenthesis y subscript i right parenthesis right parenthesis
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No campo da Matemática, existem diversas medidas e ferramentas que podem ser utilizadas para avaliar a capacidade de generalização de um modelo, o que representa fazer predições corretas utilizando um novo conjunto de dados. Dessas ferramentas, pode-se destacar: (a) acurácia; (b) taxa de erro; (c) matriz de confusão e; (d) Receiver Operating Characteristic (ROC) ou algoritmo por ordem de grandeza. Assinale a alternativa correta que demonstra a fórmula da taxa de erro. a. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 1 to n of I left parenthesis y subscript i equals f with hat on top left parenthesis x subscript i right parenthesis right parenthesis b. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 1 to n of I left parenthesis x subscript i equals f with hat on top left parenthesis y subscript i right parenthesis right parenthesis c. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 1 to n of I left parenthesis x subscript i not equal to f with hat on top left parenthesis y subscript i right parenthesis right parenthesis d. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 0 to n of I left parenthesis y subscript i not equal to f with hat on top left parenthesis x subscript i right parenthesis right parenthesis e. e r r left parenthesis f with hat on top right parenthesis equals 1 over n sum from i equals 1 to n of I left parenthesis y subscript i not equal to f with hat on top left parenthesis x subscript i right parenthesis right parenthesis
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