For questions 2-7, refer to the sample regression function below, which was estimated by OLS using a random sample of n=600 brick-and-mortar retail clothing stores in the U.S. in a given month. The variables are: - Insales is the natural log of a store's total revenue in that month. - sqft is the size of the store, measured in 1000's of square feet, - empl is the number of sales employees who worked at the store in that month. - pctpt is the percentage of employees who worked part-time that month. The estimated model is: lnsales=10.99+.101sqft+.032empl.003pctpt(.068)(.008)(.002) Robust standard errors are reported below the coefficient estimates. Write a verbal interpretation of the coefficient .003 on pctpt and its standard error. In particular: - Do not rely on the zero conditional mean assumption - Be careful when stating the units - State whether or not the coefficient is statistically significant at a 5% level. For questions 2-7, refer to the sample regression function below, which was estimated by OLS using a random sample of n=600 brick-and-mortar retail clothing stores in the U.S. in a given month. The variables are: - Insales is the natural log of a store's total revenue in that month. - sqft is the size of the store, measured in 1000's of square feet, - empl is the number of sales employees who worked at the store in that month. - pctpt is the percentage of employees who worked part-time that month. The estimated model is: lnsales=10.99+.101sqft+.032empl.003pctpt(.068)(.008)(.002) Robust standard errors are reported below the coefficient estimates. Write a verbal interpretation of the coefficient .003 on pctpt and its standard error. In particular: - Do not rely on the zero conditional mean assumption - Be careful when stating the units - State whether or not the coefficient is statistically significant at a 5% level