The 95% confidence interval for the true effect of the managerial experience variable is

a) -.033

b) -.007

c) -.002

d) .004

The output below is OLS estimation of log output, (Inoutput) as a function of inputs: capital stock (number of units), labour (number of people) and years of managerial experience on a sample of farms. Output is measured in thousands of kilograms. The managerial experience variable is a proxy for the unobserved variable managerial efficiency LnOutput = bo + b Capital + b2Labour + b3Manage_Experience + Ui Some of the information from the output has been hidden. reg Inoutput capital labour manexper Source MS F(3, 71) R-squared Ady R-squared Total ! 41.000000 SS dt Number of obs 5.33333333 15.01 0.0000 Prob > E Modell Residual 3 71 25.000000 74 .554054054 Root MSE 59333 Inoutput Coef. Std. Err. t P>It! [958 Conf. Intervall .0257329 021624 .0093455 .0003071 capital labour manexper cons .0606554 .0434242 .0205922 .9097925 2.36 2.01 1.50 3.98 .1119653 .0865414 0.021 0.048 0.138 0.000 .2285037 . 454169 1.365416