/*! 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} Problem 17 Identify the type of sampling us... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Problem 17

Identify the type of sampling used. A survey regarding download time on a certain Web site is administered on the Internet by a market research firm to anyone who would like to take it.

Short Answer

Expert verified
Self-selected sampling.

Step by step solution

01

Understand the Survey Method

Identify how the survey is being conducted and who is eligible to participate. In this case, the survey is available on the Internet to anyone interested.
02

Identify the Voluntariness of Participation

Determine if participants are volunteering to take the survey. Here, participation is voluntary as people can choose to take the survey or not.
03

Define the Type of Sampling

Based on the voluntary nature of participation, this is an example of a sampling method where individuals self-select to participate.
04

Name the Sampling Method

The sampling method described in this scenario is known as 'Self-Selected Sampling' or 'Voluntary Response Sampling.'

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!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Self-Selected Sampling
Self-selected sampling is when participants choose themselves to be part of a survey. This means they volunteer to take part, rather than being chosen by random selection or another systematic method. For example, in the scenario given, people on the internet can decide if they want to take the survey about download times.

This sampling method has a few characteristics:
  • Participants control their involvement.
  • Data might be biased, as it only includes those who are interested.
  • It鈥檚 often used for online surveys where anyone can participate.

Self-selected sampling can be useful when gathering data quickly or when you want to attract responses from people who feel strongly about the topic.
However, the data collected might not represent the broader population accurately.
Voluntary Response Sampling
Voluntary response sampling is a type of self-selected sampling. It refers specifically to surveys where participants decide to take part without being approached directly. Typical examples include online polls or feedback forms where the invitation is broad and open.

With voluntary response sampling, certain advantages and disadvantages come into play:
  • It's easy and inexpensive to gather survey responses.
  • The method can lead to biased results, as only those with strong opinions may respond.
  • It allows for quick data collection from a large but non-random audience.

An example from the exercise context would be the market research firm鈥檚 online survey about download times. People voluntarily take the survey, which might attract those who had particularly good or bad experiences.
But it is important to remember that these results might not represent everyone鈥檚 experiences accurately.
Survey Methodology
Survey methodology involves the study and implementation of methods for collecting, analyzing, and interpreting survey data. It helps ensure the data gathered is valid, reliable, and unbiased.
In the context of the exercise, we can consider several aspects:
  • The target population, which is everyone using the website.
  • The sampling method, which is self-selected/voluntary response.
  • The data collection technique, which is an internet survey.

By examining these components, we can understand the strengths and weaknesses of the survey method.

A good survey methodology aims to:
  • Engage a representative sample of the population.
  • Minimize biases in data collection.
  • Ensure the questions are clear and yield useful information.

Applied properly, survey methodology helps build a reliable picture of the data being studied, making the results more useful and accurate in decision-making or analysis.

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

Identify the type of sampling used. A group of lobbyists has a list of the 100 senators of the United States. To determine the Senate's position regarding farm subsidies, they decide to talk with every seventh senator on the list, starting with the third.

Read the newspaper article and identify (a) the research question the study addresses, (b) the population, (c) the sample, \((d)\) the descriptive statistics, and (e) the inferences of the study. By Jeff Donn Associated Press February 20,2005 BOSTON-Levels of a stress-related protein in the blood could give doctors a powerful new tool for deciding which patients with clogged heart arteries are most in danger and need aggressive treatment, a study found. This protein is yet another predictor of heart trouble, in addition to such substances as cholesterol and C-reactive protein. The Danish study, published in Thursday's New England Journal of Medicine, focused on a substance called B-natriuretic peptide, or BNP, released into the blood when the heart is stressed. Some doctors already test for this protein to help evaluate patients with shortness of breath who may be suffering from congestive heart disease. The researchers measured the protein levels in 1,034 patients and followed their health for nine years. People with the highest protein levels were \(2 \frac{1}{2}\) times more likely to die from any cause than those with the lowest. This protein could help doctors decide which patients need angioplasty or heart-bypass surgery. "It sort of tells you that no matter what condition you have, higher levels of these peptides are associated with worse outcomes," said cardiologist Dr. James de Lemos, at the University of Texas Southwestern Medical Center.

Professor Andy Neill wanted to determine if the reaction time in people differs in their dominant hand versus their nondominant hand. To do this, he recruited 15 students. Each student was asked to hold a yardstick between the index finger and thumb. The student was asked to open the hand, release the yardstick, and then asked to catch the yardstick between the index finger and thumb. The distance that the yardstick fell served as a measure of reaction time. A coin flip was used to determine whether the student would use their dominant hand first or the nondominant hand. Results indicated that the reaction time in the dominant hand exceeded that of the nondominant hand. (a) What type of experimental design is this? (b) What is the response variable in this study? (c) What is the factor? What is the treatment? (d) Identify the experimental units. (e) Why did Professor Neill use a coin flip to determine whether the student should begin with the dominant hand or the nondominant hand? (f) Draw a diagram similar to Figure 6 or 7 to illustrate the design.

Identify the type of sampling used. A school official divides the student population into five classes: freshman, sophomore, junior, senior, and graduate student. The official takes a simple random sample from each class and asks the members' opinions regarding student services.

Determine whether the study depicts an observational study or an experiment. Researchers Helle Collatz Christensen and co-workers examined the possible association between the use of cellular telephones and the development of acoustic neuroma (a noncancerous growth in the inner ear) by comparing 106 cases of individuals with acoustic neuroma to 212 cases of individuals who did not have acoustic neuroma. The data obtained included information on the use of cellular telephones from personal interviews, data from medical records, and the results of radiologic examinations. (Source: "Cellular Telephone Use and Risk of Acoustic Neuroma," Helle Collatz Christensen, Joachim Sch眉z, Michael Kosteljanetz, Hans Skovgaard Poulsen, Jens Thomsen, and Christoffer Johansen; American Journal of Epidemiology \(2004 ; \quad 159: 277-283)\) (IMAGE CAN'T COPY)
See all solutions

Recommended explanations on Math Textbooks

Mechanics Maths

Read Explanation

Statistics

Read Explanation

Probability and Statistics

Read Explanation

Decision Maths

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Discrete 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.