做緊project, 但睇唔明條問題要我做咩[ econ ]

Collect the monthly data on the U.S. All Grades All Formulations Retail GasolinePrices (Dollars per Gallon) and the U.S. Ending Stocks of Crude Oil (Thousand Barrels) from the U.S. Energy Information Administration (www.eia.gov/petroleum/data.cfm) over the period from January 1994 to October 2013.

Denote the first series as P and the second series as Q. Divide the data into
ten groups each with equal number of observations on P & Q based on P. That is, the first group consists of 24 observations on P & Q with P belongs to the lowest 10% of all the observations on P and the 10th group consists of 23 observations on P & Q with P belongs to the highest 10% of all the observations on P. Compute the average of P and the average of Q in each group and you should have ten means on P and ten means on Q. Plot the mean P against the mean Q in a diagram. The mean P should be on the y-axis and in ascending order (i.e. from small to large).

Comment on this diagram briefly. (Note: The U.S. Ending Stocks of Crude Oil represents the supply of crude oil in the U.S. market and the law of supply stated that the supply curve is upward sloping. You may want to comment your finding based on the supply-demand analysis).

隻隻字都睇得明但串埋一齊係完全唔知佢要我做乜 .__.
有冇有心人士打救一下 / _ \ ..........
我想知佢要我做乜 / _ \