D Question 1 18 pts There are 7 parts to this question. You will be asked to provide just 1 answer in each part. You ask your Economics professor why attendance is mandatory in his class, and he tells you that there is a positive relationship between academic performance and attendance. To prove this to you, your professor uses a sample of 3,000 students from past summer courses he's taught and constructs two variables: a dummy variable () ) that takes the value 1 if a student obtained a final exam grade of 80 or better (and is zero otherwise), and another variable (X) that represents the number of lectures (out of 10) the student attended during the summer. The probit regression results are Pr(Y = 1/X) = $( 0.5 + 0.1 X) (0.25) (0.05) where the numbers in parentheses (below the coefficients) are the robust standard errors. Part (a) Let B1 denote the true effect of attendance on the likelihood of getting an 80 or better. State the null and alternative hypotheses for the test that attending lecture does not matter for obtaining an 80 or better in the final exam, against the alternative that there is a positive effect of attending lecture. A) The null is Ho : B1 = 0 and the alternative is H1 : B1 > 0. B) The null is Ho : B1 = 0 and the alternative is H1 : B1