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Chapter 1: Problem 37

Research the sampling methods used by a market research firm in your neighborhood. Report your findings to the class. The report should include the types of sampling methods used, number of stages, and sample size.

Short Answer

Expert verified
Identify firms, collect and document sampling methods, stages, and sample sizes, and present your findings.

Step by step solution

01

- Identify Local Market Research Firms

Find market research firms operating in the neighborhood. You can search online, use local directories, or ask for recommendations.
02

- Collect Information from Identified Firms

Contact the identified firms and inquire about their sampling methods, the number of stages in their process, and the typical sample sizes they use. This can be done via emails, phone calls, or direct visits.
03

- Document the Sampling Methods

Make a detailed list of the different sampling methods each firm uses. Common methods include random sampling, stratified sampling, cluster sampling, and systematic sampling.
04

- Record the Number of Stages

Determine if the firms use single-stage or multi-stage sampling. Multi-stage sampling involves dividing the population into groups and then randomly selecting individuals from these groups.
05

- Note the Sample Sizes

Record the sample sizes used by the firms. This should include the total number of participants they generally aim for in their studies.
06

- Prepare the Report

Compile all the collected data into a report. Include the types of sampling methods used, the number of stages involved, and the sample sizes. Ensure the report is clear and well-organized.
07

- Present the Findings

Prepare a short presentation summarizing the key points of your report. Include the types of sampling methods, stages, and sample sizes.

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Key Concepts

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

types of sampling methods
Sampling methods are essential in market research because they help researchers select a portion of the population that will represent the entire group. The main types of sampling methods include:
  • Random Sampling: Each member of the population has an equal chance of being selected. This method aims to eliminate bias and provide a true representation.
  • Stratified Sampling: The population is divided into subgroups (strata) based on a shared characteristic, then random samples are taken from each stratum. This method ensures that specific subgroups are adequately represented.
  • Cluster Sampling: The population is divided into clusters, then a random sample of clusters is chosen, and all members within selected clusters are surveyed. It's helpful for large and dispersed populations.
  • Systematic Sampling: Every nth member of the population is selected after choosing a random starting point. This method is simpler to implement but requires an ordered list of the population.

    • By understanding these core methods, one can better appreciate how market researchers gather data efficiently and effectively.
    multi-stage sampling
    Multi-stage sampling is a complex form of cluster sampling. It's used when a population is too large and dispersed for simple random sampling. Here's how it works:
    In multi-stage sampling, researchers divide the population into groups at various stages. For instance:
  • Stage 1: The entire population is divided into large clusters.
  • Stage 2: A random sample of these clusters is chosen.
  • Stage 3: Within each chosen cluster, further sub-groups or smaller clusters are selected.
  • Stage 4: Individual members are sampled from these sub-groups.

    • This multi-step approach allows researchers to manage large samples more efficiently, reducing logistical costs and making the process more practical. Each stage adds a layer of sampling that helps refine the population, ensuring the final sample is manageable and representative.
    sample size
    Determining the sample size is crucial for obtaining accurate results in market research. Sample size refers to the number of participants or observations included in a study. Several factors affect the ideal sample size, such as:
  • Population Size: Larger populations require larger samples to represent the diversity accurately.
  • Margin of Error: Smaller margins of error require larger sample sizes to ensure precision.
  • Confidence Level: A higher confidence level (e.g., 95% vs. 90%) requires a larger sample size.
  • Variability: Populations with higher variability need larger samples to capture the range of responses.

    • Researchers aim to balance between a sufficiently large sample to ensure reliability and the practical constraints like cost and time. Accurate sample size calculation enhances the validity of the research findings and helps in drawing meaningful conclusions.

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    Most popular questions from this chapter

    Suppose you are the president of the student government. You wish to conduct a survey to determine the student body's opinion regarding student services. The administration provides you with a list of the names and phone numbers of the 19,935 registered students. (a) Discuss the procedure you would follow to obtain a simple random sample of 25 students. (b) Obtain this sample.

    A researcher has recruited 20 volunteers to participate in a study. The researcher wishes to measure the effect of alcohol on an individual's reaction time. The 20 volunteers are randomly divided into two groups. Group 1 will serve as a control group in which participants drink four 1 -ounce cups of a liquid that looks, smells, and tastes like alcohol in 15 -minute increments. Group 2 will serve as an experimental group in which participants drink four 1-ounce cups of 80-proof alcohol in 15 -minute increments. After drinking the last 1- ounce cup, the participants sit for 20 minutes. After the 20-minute resting period, the reaction time to a stimulus is measured. (a) What type of experimental design is this? (b) Use Table I in Appendix A or a random-number generator to divide the 20 volunteers into groups 1 and 2 by assigning the volunteers a number between 1 and 20. Then randomly select 10 numbers between 1 and 20. The individuals corresponding to these numbers will go into group \(1 .\)

    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.

    A research objective is presented. For each research objective, 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 of all households within the United States, such as income.

    Classify the variable as qualitative or quantitative. Nation of origin
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