Let us consider that we want to analyze the production function of a particular economic sector that is
composed by 100 firms. To that end, we dispose of a database (file ej1.wf1) with information of the
following variables, all of them referred to 2002:
 
- output (in m.u.)
- l1t: number of experienced employees 
- l2t: number of non-experienced employees 
- k1t: invested capital in heavy machinery (in m.u.) 
- k2t: invested capital in light machinery (in m.u.)

Using this information:

a) Obtain the mean, the standard deviation and the coefficient  of variation of all the variables.
b) How many variables follow a normal distribution?
c) Graph the output against the rest of the variables
d) Estimate a linear relationship between output and the rest of the variables.

Write the results in a file named EJ1XX.DOC, where XX is the corresponding student NIA.

Send this file to the following e-address: adeeconometrics@gmail.com