/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Q9BSC Determine whether the sampling m... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Q9BSC (page 1)

Determine whether the sampling method appears to be sound or is flawed.

Nuclear Power Plants. In a survey of 1368 subjects, the following question was posted on the USA Today website: 鈥淚n your view, are nuclear plants safe?鈥� The survey subjects were Internet users who chose to respond to the question posted on the electronic edition of USA Today.

Short Answer

Expert verified

The sampling method is flawed.

Step by step solution

01

Given information

  • The survey question enquires whether nuclear plants are safe or not.
  • The number of subjects who took the survey was 1368.
  • The respondents were net users who self-participated in the survey. The question of the survey was published in the electronic edition (website) of USA Today.
02

Explain the sampling method

The survey comprises the responses from subjects (participants of the study) who volunteered to answer the questions on the internet. Thus, the sampling method is volunteer sampling.

Moreover, the responses were taken only from those readers who read the electronic edition of USA Today.

03

Explain if the sampling method is flawed or sound

The volunteer response sampling is a biased method as the subjects do not represent the entire population.

The sampling must be done randomly to derive accurate results in the study.

Thus, the sampling method is flawed.

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.

Over 30 million students worldwide already upgrade their learning with 91影视!

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

Determine whether the sampling method appears to be sound or is flawed.

Clinical Trials. Researchers at Yale University conduct a wide variety of clinical trials by using subjects who volunteer after reading advertisements soliciting paid volunteers.

In Exercises 5鈥�20, assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. (Note: Answers in Appendix D include technology answers based on Formula 9-1 along with 鈥淭able鈥� answers based on Table A-3 with df equal to the smaller of n1鈭�1 and n2鈭�1.)

Are Quarters Now Lighter? Weights of quarters are carefully considered in the design of the vending machines that we have all come to know and love. Data Set 29 鈥淐oin Weights鈥� in Appendix B includes weights of a sample of pre-1964 quarters (n = 40, x = 6.19267 g, s = 0.08700 g) and weights of a sample of post-1964 quarters (n = 40, x = 5.63930 g, s = 0.06194 g).

a. Use a 0.05 significance level to test the claim that pre-1964 quarters have a mean weight that is greater than the mean weight of post-1964 quarters.

b. Construct a confidence interval appropriate for the hypothesis test in part (a).

c. Do post-1964 quarters appear to weigh less than before 1964? If so, why aren鈥檛 vending machines affected very much by the difference?

In Exercises 33鈥�36, identify which of these designs is most appropriate for the given experiment: completely randomized design, randomized block design, or matched pairs design

Lipitor A clinical trial of Lipitor treatments is being planned to determine whether its effects on diastolic blood pressure are different for men and women.

What鈥檚 Wrong with This Picture? The Newport Chronicle ran a survey by asking readers to call in their response to this question: 鈥淒o you support the development of atomic weapons that could kill millions of innocent people?鈥� It was reported that 20 readers responded and that 87% said 鈥渘o,鈥� while 13% said 鈥測es.鈥� Identify four major flaws in this survey.

What鈥檚 Wrong? In Exercises 25鈥�28, identify what is wrong.

Potatoes In a poll sponsored by the Idaho Potato Commission, 1000 adults were asked to select their favorite vegetables, and the favorite choice was potatoes, which were selected by 26% of the respondents.
See all solutions

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Read Explanation

Decision Maths

Read Explanation

Logic and Functions

Read Explanation

Statistics

Read Explanation

Geometry

Read Explanation

Applied Mathematics

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.