/*! 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 42 A research objective is presente... [FREE SOLUTION] | 91影视

91影视

Log out

Learning Materials

Features

Discover

Chapter 1: Problem 42

A research objective is presented. For each, identify the population and sample in the study. Every year the U.S. Census Bureau releases the Current Population Report based on a survey of 50,000 households. The goal of this report is to learn the demographic characteristics. such as income, of all households within the United States.

Short Answer

Expert verified
Population: All households within the United States. Sample: 50,000 households surveyed.

Step by step solution

01

- Understanding the Objective

First, understand that the research objective is to learn the demographic characteristics, such as income, of all households within the United States.
02

- Identify the Population

The population is the entire group that the research is interested in studying. From the objective, the population is all households within the United States.
03

- Identify the Sample

The sample is the subset of the population that is actually surveyed. According to the given information, the sample consists of 50,000 households that were surveyed by the U.S. Census Bureau.

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.

Population in Statistics
Understanding the concept of a 'population' in statistics is crucial for any study. In statistical terms, the population refers to the entire group of individuals or instances about which researchers want to draw conclusions.
For example, in the exercise, the population consists of all households within the United States. Researchers are interested in learning about the characteristics of this vast group.
It's important to remember that the population isn't limited to people. It can be any group of entities, such as animals, products, or events, that share common characteristics.
The choice of population significantly impacts the scope and conclusions of the study, so researchers must define it clearly.
Sample in Statistics
In a statistical study, examining the entire population is often impractical or impossible. This is where the concept of a 'sample' comes in. A sample is a subset of the population that is chosen for the actual study.
For instance, in the provided exercise, instead of surveying all households in the United States, the Census Bureau surveyed 50,000 households. This subset is the sample.
The goal of using a sample is to make inferences about the population without needing to study every individual. However, the sample must be representative of the population to ensure valid and reliable conclusions.
Researchers use various sampling methods like random sampling, stratified sampling, or systematic sampling to achieve representativeness.
Demographic Characteristics
Demographic characteristics are the specific attributes of the individuals within a population. These can include aspects like age, gender, income, education level, and ethnicity.
In the exercise, the Census Bureau aimed to learn about the income levels of households within the United States. Income is thus one of the demographic characteristics they focused on.
Understanding demographic characteristics helps researchers identify trends, make comparisons, and understand the distribution of various traits within the population.
Accurate demographic data is crucial for public policy, marketing, social science research, and various other fields as it helps in making informed decisions.

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

A local golf pro wanted to compare two styles of golf club. One golf club had a graphite shaft and the other had a steel shaft. It is believed that graphite shafts allow a player to hit the ball farther, but the manufacturer of the new steel shaft said the ball travels just as far with its new technology. To test this belief, the pro recruited 10 golfers from the driving range. Each player was asked to hit one ball with the graphite-shafted club and one ball with the new steel-shafted club. The distance that the ball traveled was determined using a range finder. A coin flip was used to determine whether the player hit with the graphite club or the steel club first. Results indicated that the distance the ball was hit with the graphite club was no different than the distance when using the steel club. (a) What type of experimental design is this? (b) What is the response variable in this study? (c) What is the factor that is set to predetermined levels? What is the treatment? (d) Identify the experimental units. (e) Why did the golf pro use a coin flip to determine whether the golfer should hit with the graphite first or the steel first? (f) Draw a diagram similar to Figure \(7,8,\) or 10 to illustrate the design.

In October 2014 , there was an Ebola breakout in West Africa. At the time, there was no vaccine for the virus, however, there were some experimental drugs that had not yet been approved for humans. Because the spread of the disease was reaching an epidemic, there were calls to initiate randomized trials of an experimental drug on human subjects right away. (a) Discuss how you would go about designing a randomized trial to assess the efficacy of an experimental Ebola vaccine. (b) Doctors Without Borders was on the record, prior to any randomized trial, as saying that trials in which subjects are assigned to a control group are unethical. Discuss the ethics behind a randomized trial of a potential life- saving vaccine to test its efficacy while an epidemic is raging.

In Problems 11-22, identify the type of sampling used. The human resource department at a certain company wants to conduct a survey regarding worker morale. The department has an alphabetical list of all 4502 employees at the company and wants to conduct a systematic sample. (a) Determine \(k\) if the sample size is \(50 .\) (b) Determine the individuals who will be administered the survev. More than one answer is possible.

In Problems 11-22, identify the type of sampling used. To determine customer opinion of its boarding policy, Southwest Airlines randomly selects 60 flights during a certain week and surveys all passengers on the flights.

In Problems 11-22, identify the type of sampling used. Suppose a political strategist wants to get a sense of how American adults aged 18 years or older feel about health care and health incurance (a) In a political poll, what would be a good frame to use for obtaining a sample? (b) Explain why simple random sampling may not guarantee that the sample has an accurate representation of registered Democrats, registered Republicans, and registered Independents. (c) How can stratified sampling guarantee this representation?
See all solutions

Recommended explanations on Math Textbooks

Geometry

Read Explanation

Decision Maths

Read Explanation

Mechanics Maths

Read Explanation

Discrete Mathematics

Read Explanation

Probability and Statistics

Read Explanation

Logic and Functions

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.