Attachment 1Attachment 2Data for the following regression model are in this file.Y: = [30 + ?lei + ?zXzi + ?3X3i + ?4X4i + H:Estimate the model using the OLS method. 1. Construct a 90% confidence interval for ?g.2. Using the critical value method and a significance level of 5%, test H0 : ?l = 1 against H1:?17é1- Show all your working, including the output for the estimated model. For the hypothesis test,in your answer you should state the null and alternative hypotheses, the significance level, theformula for the test statistic, the PDF of the test statistic under the null hypothesis, the valueof the test statistic, the critical value and your conclusion.
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