Answered: Conditions For each situation described…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

Conditions For each situation described below, identify

the population and the sample, explain what p and pn rep-
resent, and tell whether the methods of this chapter can

be used to create a confidence interval.
a) Police set up an auto checkpoint at which drivers are
stopped and their cars inspected for safety problems.
They find that 14 of the 134 cars stopped have at least

one safety violation. They want to estimate the per-
centage of all cars that may be unsafe.

b) A TV talk show asks viewers to register their opinions
on prayer in schools by logging on to a website. Of the
602 people who voted, 488 favored prayer in schools.
We want to estimate the level of support among the
general public.
c) A school is considering requiring students to wear

uniforms. The PTA surveys parent opinion by send-
ing a questionnaire home with all 1245 students; 380

surveys are returned, with 228 families in favor of the
change.
d) A college admits 1632 freshmen one year, and four
years later 1388 of them graduate on time. The college
wants to estimate the percentage of all their freshman
enrollees who graduate on time.

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