(1) What are the values of the sample proportion of people who live within 1 mile of a hazardous waste site and its standard error?
 
 Solution:
 
 pˆ = 0.3, and standard error p
 
 0.3 Ă— 0.7/450 = 0.0216.
 
 
 
 (2) What are the values of the sample proportion of people who live outside of the 1 mile radius around a hazardous waste site and its standard error?
 
 Solution:
 
 pˆ = 0.7, and standard error p
 
 0.3 Ă— 0.7/450 = 0.0216.