Suppose the median weekly earnings for recent college graduates in a large city by quarter for the..

Suppose the median weekly earnings for recent college
graduates in a large city by quarter for the years 2004 to 2011 are as follows:

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a. Prepare a line chart of the median earnings by quarter.

b. Estimate a linear trend line for this set of data.

c. Produce a forecast for each quarter using the linear
trend line you estimated in part b.

d. Calculate the error for each period.

 e. Calculate the Durbin-Watson statistic and test for
positive autocorrelation. Use a level of significance of 0.05.

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