Question: Using the dataset http: www.stata-press.com / data /r9/school.dta, fit a bivariate probity model of private (whether a student is enrolled in private school) and vote (whether the parent voted in favor of public school funding). Model the first response variable as depending on years and log tax, the tax burden: and estimate the second response variable as depending on those factors plus logic. Are these equations successful? What do the estimate of p and the associated Wald test tell you?