The All American Toy Company has records for quarterly sales for the past 4 years. These data are shown as follows: 
Given these data, develop a forecast for quarter 17 using a double exponential smoothing model with alpha = 0.20, beta = 0.30 and starting values for C and T based on the linear trend regression model for periods 1-16.
Definitions:
Association
In statistics, it refers to any relationship or correlation between two or more variables.
Null Hypothesis
A default statement in statistics that there is no significant effect or no difference, usually set as the assertion to be tested.
Chi-Square Test
A statistical test used to determine if a significant difference exists between the expected frequencies and the observed frequencies in one or more categories.
Independence
The state of being free from outside control or influence; in statistics, it refers to the scenario where the occurrence of one event does not affect the probability of another.
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