In order to estimate the difference between the average yearly salaries of top managers in private and governmental organizations, the following information was gathered. 
Develop an interval estimate for the difference between the average yearly salaries of top managers of the two sectors.Use 95% confidence and give your answers in dollars.
Definitions:
Absorption Costing
An accounting method that includes all manufacturing costs (both fixed and variable) in the cost of a product.
Net Income
The total earnings of a company after subtracting all expenses, taxes, and costs, reflecting the actual profitability.
Absorption Costing
A method of accounting that incorporates both variable and fixed manufacturing expenses into the pricing of a product.
Variable Costing
A costing method in which only variable production costs are assigned to inventory and cost of goods sold, excluding fixed manufacturing overhead.
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