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Hypothesis Testing - Chi Square Test

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For many years TV executives used the guideline that 30 percent of the audience were
watching each of the prime-time networks and 10 percent were watching cable stations on
a weekday night.
A random sample of 500 viewers in the Tampa-St. Petersburg, Florida, area last Monday night showed that 165 homes were tuned in to the ABC affiliate, 140 to
the CBS affiliate, 125 to the NBC affiliate, and the remainder was viewing a cable station.
At the .05 significance level, can we conclude that the guideline is still reasonable?

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Solution Summary

Complete, Neat and Step-by-step Hypothesis Testing and Conclusion.