During "sweeps week" last year, the viewing audience was distributed as follows: 36% NBC, 22% ABC, and 24% CBS, and 18% FOX. This year during "sweeps week" a sample of 50 homes yielded the following data. Use Excel to test at = .05 to determine if the audience proportions have changed. 
Definitions:
Purchase Price
The amount of money paid to acquire a product or service.
Cash
Cash in the form of coins or paper money, ready for trading or banking activities.
Beginning Balance
The amount of money or value of an account at the start of a new accounting period.
Ending Balance
The final amount in an account at the end of a reporting period, after all additions and subtractions have been accounted for.
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