# Question

A factory operator hypothesized that his unit output costs (y) depend on wage rate (x1), other input costs (x2), overhead costs (x3), and advertising expenditures (x4). A series of 24 monthly observations was obtained, and a least squares estimate of the model yielded the following results:

The figures in parentheses below the estimated coefficients are their estimated standard errors. What can you conclude from these results?

The figures in parentheses below the estimated coefficients are their estimated standard errors. What can you conclude from these results?

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