Using sample of 10, 000 observations from the Current Population Survey; YOu estimate the following relationship between average hourly eamings (ahe) and the number of years of education (educ): ahe -3.52 + [92educ The heteroskedasticity-robust standard error on the slope is (0.04). Calculate the 95% confidence interval for the slope. Repeat the exercise using the 90" and then the 99"4 confidence interval. Can you reject the null hypothesis that the slope coefficient is zero in the population? Explain.