所屬科目:研究所、轉學考(插大)◆統計學
(a) 什麼是因子間的交互作用?(10%)
(b) 因子間的交互作用檢定顯著與否,後續各應該進行什麼檢定?(10%)
(a) 如果隨機誤差項的分佈違反同質性假設,也就是 \( \varepsilon_i \) 的分佈存在異質性(heteroscedasticity),請問會對模式的估計或檢定何者產生影響?(5%) 是什麼影響?(5%)
(b) 假設異質性的型態是 \( \sigma^2_i = \sigma^2 X_{3i} \),請說明模式估計要如何進行?(15%)
(c) 如果 \( X_1 \) 變異數膨脹因子(VIF)的值為 9,請問對 \( \beta_1 \) 的檢定會產生較高的型二(II)錯誤,為什麼? (5%)
(a) probability of Type I error.
(b) probability of Type II error.
(a) Calculate the probability for visitors with high and very high revisit intention.
(b) Follow (a), calculate the 95% confidence interval for the probability.
(c) Is the probability of age 31 to 40 visitors' revisit intention (including high and very high) significantly different from the visitors aged 41 to 50? (95% confidence interval)