3. Conditions. For each situation described below,

Chapter 19, Problem 3

(choose chapter or problem)

3. Conditions. For each situation described below, identifythe population and the sample, explain what p andrepresent, and tell whether the methods of this chaptercan be used to create a confidence interval.a) Police set up an auto checkpoint at which drivers arestopped and their cars inspected for safety problems.They find that 14 of the 134 cars stopped have at leastone safety violation. They want to estimate the percentageof all cars that may be unsafe.b) A TV talk show asks viewers to register their opinionson prayer in schools by logging on to a Web site. Ofthe 602 people who voted, 488 favored prayer inschools. We want to estimate the level of supportamong the general public.c) Aschool is considering requiring students to wearuniforms. The PTAsurveys parent opinion by sendinga questionnaire home with all 1245 students;380 surveys are returned, with 228 families in favorof the change.d) A college admits 1632 freshmen one year, and fouryears later 1388 of them graduate on time. The collegewants to estimate the percentage of all their freshmanenrollees who graduate on time.