To compare the effect of weather on sales of soft drinks, a distributor surveyed people in two regions of the country and asked if they purchased soft drinks in the last month. The following are the results. The distributor would like to know if there is a difference in sales between the two regions. 
What is the pooled estimate of the population proportion?
Definitions:
Business Firm
An organization engaged in commercial, industrial, or professional activities, either for profit or non-profit.
Independent Regulatory Agencies
Independent regulatory agencies are federal bodies created by Congress to enforce and regulate specific areas of economic activity, operating with some degree of independence from executive control.
Federal Communications Commission
A United States government agency that regulates interstate and international communications via radio, television, wire, satellite, and cable.
Executive Branch
The branch of government responsible for implementing and enforcing laws, usually led by a president or prime minister.
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