The interval estimate 18.5 
2.5 is developed for a population mean in which the sample standard deviation s is 7.5. Had s equaled 15 instead, the interval estimate would be 37 
5.0.
Definitions:
Public Interest
The welfare or well-being of the general public, often considered a guiding principle for governmental policy or action.
Capital Suppliers
Entities or individuals that provide funds or resources for businesses to invest in production, expansion, or development activities.
Payments
Transactions or transfers of money in exchange for goods or services, or to fulfill a legal obligation.
Central Planning
A system where the government makes all decisions about the production and allocation of goods and services.
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