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A regression analysis (involving 45 observations) relating a dependent variable (Y) and two independent variables resulted in the following information. The SSE for the above model is 49.
When two other independent variables were added to the model, the following information was provided. This latter model's SSE is 40.
At 95% confidence test to determine if the two added independent variables contribute significantly to the model.
Ordering Costs
Expenses incurred in placing and processing orders for products, including administrative and operational costs.
Transportation Cost
Expenses associated with moving goods or materials from one location to another, including freight charges and fuel costs.
Cost from Theft
The financial impact incurred by a business due to pilferage, shoplifting, burglary, or other forms of theft.
Holding Cost
The expenses associated with storing unsold goods, including warehousing, insurance, deterioration, and loss.
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