In a survey of 3,541 adults concerning complaints about restaurants, 1,494 complained about dirty or ill-equipped bathrooms and 1,209 complained about loud or distracting diners at other tables....

Extracted text: In a survey of 3,541 adults concerning complaints about restaurants, 1,494 complained about dirty or ill-equipped bathrooms and 1,209 complained about loud or distracting diners at other tables. Complete parts (a) through (c) below. ..... a. Construct a 90% confidence interval estimate of the population proportion of adults who complained about dirty or ill-equipped bathrooms. .4082