13 de novembro de 2023• rafaelrjp
Question 1 |
A | É irrelevante, pois sempre resultam no mesmo agrupamento hierárquico independentemente da medida escolhida. |
B | É relevante, pois medidas de dissimilaridade distintas podem gerar agrupamentos hierárquicos distintos. |
C | É irrelevante, pois sempre resultam no mesmo método de encadeamento independentemente da medida escolhida. |
D | É relevante, pois medidas de dissimilaridade distintas podem gerar quantidades diferentes de clusters no estágio zero da análise hierárquica. |
Question 2 |
A | Iniciar a análise considerando que cada observação é um cluster. |
B | Iniciar a análise sabendo ao certo quantos clusters serão formados. |
C | Identificar quais serão os centroides iniciais para a análise. |
D | Iniciar a análise considerando todas as observações como um único cluster. |
Question 3 |
A | É sempre necessário, sem exceção. |
B | Sempre que as variáveis estiverem previamente padronizadas. |
C | Quando as variáveis apresentarem diferenças nas unidades de medidas. |
D | Nunca é necessário, pois as escalas se ajustam automaticamente. |
Question 4 |
A | Existe somente uma medida de dissimilaridade que pode ser utilizada nesta análise. |
B | A análise depende de escolhas como a medida de dissimilaridade e o método de encadeamento. |
C | A quantidade final de clusters deve ser conhecida antes mesmo de iniciar a análise. |
D | Existe somente um método de encadeamento que pode ser utilizado nesta análise. |
Question 5 |
A | Identifi car os centroides do método K-means. |
B | Apresentar as opções de medidas de dissimilaridade para análise. |
C | Padronizar as variáveis antes da realização da análise. |
D | Visualizar a quantidade de clusters que podem ser formados. |
Question 6 |
A | O single linkage privilegia as menores distâncias entre observações. |
B | O complete linkage privilegia as menores distâncias entre as observações. |
C | O complete linkage privilegia as distâncias médias entre as observações. |
D | O average linkage privilegia as menores distâncias entre as observações. |
Question 7 |
A | I, II e III. |
B | Apenas I e II. |
C | Apenas II. |
D | Apenas I e III. |
Question 8 |
A | Os itens I e II estão incorretos. |
B | Os itens I e II estão corretos. |
C | Somente o item II está correto. |
D | Somente o item I está correto. |
Question 9 |
A | É necessário indicar, a priori, quantos clusters serão formados para a montagem do gráfico. |
B | Quanto menor o salto de distância para a junção das observações ou clusters, mais semelhantes são as observações ou clusters agrupados. |
C | O último estágio do gráfi co indicará a formação de quantos clusters o analista deseja. |
D | A formação de clusters após grandes saltos de distâncias indicam junção de observações muito semelhantes. |
Question 10 |
A | Intervalo de confi ança para média, modelo preditivo. |
B | Teste de hipótese para coefi cientes, tabela de contingência. |
C | Medida de dissimilaridade, método de encadeamento. |
D | Matriz de correlações, teste qui-quadrado para associações. |
Last modified: 13 de novembro de 2023
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