In a survey of 1,003 adults concerning complaints about restaurants, 732 complained about dirty or ill-equipped bathrooms and 381 complained about loud or distracting diners at other tables.

Source: Data extracted from “The Gripe-O-Meter Restaurants,” Consumer Reports, August 2014, p. 11.

a. Construct a 95% confidence interval estimate of the population proportion of adults who complained about dirty or ill-equipped bathrooms.

b. Construct a 95% confidence interval estimate of the population proportion of adults who complained about loud or distracting diners at other tables.

c. How would the manager of a chain of restaurants use the results of (a) and (b)?