Login Registrieren

Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Chapter 11: Q. 11.17 (page 459)

A Harris Roll asked Americans whether states should be allowed to conduct random drug tests on elected officials. Of $21, 355$ the respondents, $79 %$ said "yes."
a. Determine the margin of error for a $99 %$ confidence interval.
b. Without doing any calculations, indicate whether the margin of error is larger or smaller for a $90 %$ confidence interval. Explain your answer.

Short Answer

Expert verified

(a)

Step by step solution

01

Part (a) Step 1: Given information

T

02

Part (a) Step 2: Explanation

T

03

Part (b) Step 1: Given information

T

04

Part (b) Step 2: Explanation

T

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Social Networking. A Pew Internet de American Life Project examined Internet social networking. Among a sample of $929$ online adults $18 - 29$ years old, $836$ said they use social networking sites. Determine a $95 %$ confidence interval for the percentage of all online adults $18 - 29$ years old who use social networking sites.

In this Exercise, we have given the number of successes and the sample size for a simple random sample from a population. In each case,

a. use the one-proportion plus-four $z$ -interval procedure to find the required confidence interval.

b. compare your result with the corresponding confidence interval found in Exercises $11.25 - 11.30$ , if finding such a confidence interval was appropriate.

$x = 40, n = 50, 95 % level$

we have given a likely range for the observed value of a sample proportion $\hat{P}$

$0.2 t o 0.4$

a. Based on the given range, identify the educated guess that should be used for the observed value of $\hat{p}$ to calculate the required sample size for a prescribed confidence level and margin of error.

b. Identify the observed values of the sample proportion that will yield a larger margin of error than the one specified if the educated guess is used for the sample-size computation.

Ballistic Fingerprinting. Guns make unique markings on bullets they fire and their shell casings. These markings are called holistic fingerprints. An ABCNEWS Podl examined the opinions of Americans on the enactment of a law "...that would require every gun sold in the United States to be test-fired first, so law enforcement would have its fingerprint in case it were ever used in a crime."

level, do the data provide sufficient evidence to conclude that women tend to favor ballistic fingerprinting more than men'?

a. Determine the sample proportion.

b. Decide whether using the one-proportion $z -$ test is appropriate.

c. If appropriate, use the one-proportion $z -$ test to perform the specified hypothesis test.

$x = 8$

$n = 40$

$H_{0} : p = 0.3$

$H_{2} : p < 0.3$

$α = 0.10$

See all solutions

Recommended explanations on Math Textbooks

Probability and Statistics

Read Explanation

Statistics

Read Explanation

Geometry

Read Explanation

Applied Mathematics

Read Explanation

Logic and Functions

Read Explanation

Mechanics Maths

Read Explanation

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free