A local planning board must consider whether to require all new projects with five or more apartments to designate some of the units as rentcontrolled. A random sample of 100 apartments in Cheyenne,...

A local planning board must consider whether to require all new projects with five or more apartments to designate some of the units as rentcontrolled. A random sample of 100 apartments in Cheyenne, Wyoming, was obtained, and 9 were found to be rent-controlled. Is there any evidence to suggest the proportion of rent-controlled apartments is less than 10%?
 and use the p value associated with this hypothesis test to draw a conclusion.

Early in 2013, a political report indicated that 86% of Americans disapprove of the job Congress is doing. In a poll of 1000 Americans during Summer 2013 by NBC News, 830 said they disapprove of the job Congress is doing.59 Is there any evidence to suggest that the proportion of Americans who disapprove of the job Congress is doing has decreased?