D Question 24 2 pts Which of the following is correct? A chi-squared iest is used to test the overall regression of a logistic regression model. At-test is used to test the statistical significance of predictors in a logistic regression model. A 2-test is used to test the statistical significance of predictors in a standard linear regression model. An F-test test is used to test the overall regression of a Poisson regression model. Question 25 2 pts The regression gim(Y-X, family=poisson) was fitted to count data, resulting in the estimate of Bo to be 20 and the estimate of B, to be 0.8. For a one unit increase in X, the rate increases by 0.8 units. O the log rate increases by 0.8 units. the log rate increases by exp(0.8) units. the rate increases by exp(0.8) percent.D Question 26 2 pts Which of the following is correct? Overdispersion is a concern for standard linear regression. O For both logistic and Poisson regression, the variance of the response equals the expectation of the response given the predicting variables. With overdispersion, the observed variance is larger than the variance implied by our model. With overdispersion, the observed variance is smaller than the variance implied by our model. ' D Question 27 2 pts Simpson's Paradox occurs when: O a coefficient of a predictor is not significant in a marginal model, and also not significant in a multivariate model the p-value of an estimate is significant at an alpha level of 0.05 but not at an alpha level of 0.01 the coefficient of a predictor reverses sign when considered under a marginal model versus a conditional model O Homer Simpson buys a dozen doughnuts and O remain when he arrives home