Which of the following is a violation of one of the major assumptions of the simple regression model?

a. the error terms are independent of each other.

b. a histogram of the residuals forms a bell-shaped, symmetrical curve.

c. the error terms show no pattern.

d. as the value of x increases, the value of the error term also increases.

Which of the following accurately describes a situation in which consumers have elastic demand? a. a restaurant starts using margarine instead of butter because butter becomes more expensive. b. consumers boycott a restaurant because the waiters aren't paid minimum wage. c. a company starts using sugar instead of corn syrup because its revenues are up. d. people give up eating pasta and bread because they want to lose weight. 2b2t

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Using a cps-sample of 7,440 individuals, you estimate the following regression: = 20.91 - 2.61 x female where female is a binary variable that takes on the value of 1 for females and is 0 otherwise. the standard error on the coefficient on female is 0.25. the 95% confidence interval for the gender wage gap, or the amount that females earn less, is: a) [-3.10, -2.12] b) [18.30, 23.52] c) [-3.02, -2.20] d) [-1.96, -1.64]