In order to estimate the difference between the average hourly wages of employees of two branches of a department store, the following data have been gathered. 
A 95% interval estimate for the difference between the two population means is
Definitions:
Electric Power Company
A business entity that generates, transmits, and distributes electricity to consumers and businesses.
Total Profits
The total earnings of a business after subtracting all costs and expenses from the total revenue.
Single-Price Monopoly
A market structure where the monopolist charges all consumers the same price for its sole product.
Market Elasticity
The measure of how much the quantity demanded or supplied of a product changes in response to a change in price.
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