Exhibit 11.15
The following questions use the data below.
The owner of Tim's Toys wants to predict monthly sales. He has collected data for 12 months. He needs your help in analyzing this data using weighted moving averages. 
-Refer to Exhibit 11.15. What formulas should go in cells C5:C16 of the spreadsheet if Bill uses a 2 month weighted moving average forecasting model?
Definitions:
Joint Probability
The probability of two events happening at the same time.
Intersection
The point or set of points where two or more geometric figures meet or cross.
Mutually Exclusive
Situations or events that cannot occur at the same time, meaning if one happens, the other cannot.
Joint Probability
The likelihood of the occurrence of multiple events simultaneously.
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