In a speech to the Chamber of Commerce, a city councilman claims that in his city less than 15% of the adult male population is unemployed. A subsequent check taken by a newspaper reporter showed that among 300 adult males polled, 36 were unemployed. Is there sufficient evidence to support the councilman's claim at a level of significance of .05?
Ho: The percentage of adult male population unemployed is equal to 15%
Ha: The percentage of adult male population ...