What are statistical models according to Walter (2000)? I - Statistical models are mathematical equations that represent real situations through t...
What are statistical models according to Walter (2000)?
I - Statistical models are mathematical equations that represent real situations through the relationship between effect variables.
II - The variables that exert influence on a certain situation are called effect variables.
III - The real situations are the response variables (Y), as they are the responses of the interactions between the effect variables (X).
IV - The effect of X on Y can be expressed through a mathematical model.
V - The models are used to predict situations and assist in decision making.
a) Only statements I, II and III are correct.
b) Only statements II, III and IV are correct.
c) Only statements I, III and V are correct.
d) All statements are correct.
I - Statistical models are mathematical equations that represent real situations through the relationship between effect variables.
II - The variables that exert influence on a certain situation are called effect variables.
III - The real situations are the response variables (Y), as they are the responses of the interactions between the effect variables (X).
IV - The effect of X on Y can be expressed through a mathematical model.
V - The models are used to predict situations and assist in decision making.
a) Only statements I, II and III are correct.
b) Only statements II, III and IV are correct.
c) Only statements I, III and V are correct.
d) All statements are correct.
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Ed 
De acordo com Walter (2000), modelos estatísticos são equações matemáticas que representam situações reais por meio da relação entre variáveis de efeito. As variáveis que exercem influência em uma determinada situação são chamadas de variáveis de efeito. As situações reais são as variáveis de resposta (Y), pois são as respostas das interações entre as variáveis de efeito (X). O efeito de X em Y pode ser expresso por meio de um modelo matemático. Os modelos são usados para prever situações e auxiliar na tomada de decisões. Portanto, a alternativa correta é a letra d) Todas as afirmações estão corretas.
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