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A school board at a local community college is considering raising the student services fees. The board wants to obtain the opinion of the student body before proceeding. Design a sampling method to obtain the individuals in the sample. Be sure to support your choice.

Short Answer

Expert verified
Use stratified sampling to ensure all student subgroups are fairly represented.

Step by step solution

01

Identify the Population

Determine that the population includes all students currently enrolled in the community college.
02

Choose a Sampling Method

Select a random sampling method to ensure each student has an equal chance of being selected. This could be simple random sampling, stratified sampling, or systematic sampling.
03

Explain Simple Random Sampling

For simple random sampling, list all students and use a random number generator to pick a subset of students.
04

Explain Stratified Sampling

For stratified sampling, divide students into subgroups (strata) based on characteristics like grade level or major and then randomly sample from each subgroup.
05

Explain Systematic Sampling

For systematic sampling, list all students and select every nth student after a random starting point.
06

Choose the Best Method

Decide which method suits the sample's needs best. Stratified sampling might work well if opinions might vary significantly across different subgroups.
07

Support Your Decision

If stratified sampling is chosen, justify that stratified sampling ensures representation across key student subgroups, leading to more reliable and generalizable opinions.

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Key Concepts

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

simple random sampling
Simple random sampling is one of the most basic sampling techniques. It ensures that each individual in a population has an equal chance of being chosen.
This is how it works:
A list of all individuals in the population is compiled. In this case, all students currently enrolled in the community college.
Each student is assigned a unique number.
Using a random number generator, select a subset of students without any bias.
This method is straightforward and minimizes selection bias. However, it may not always provide the most accurate representation if there are significant differences within subgroups of the population.
stratified sampling
Stratified sampling involves dividing the population into distinct subgroups or 'strata' before sampling. The idea is to ensure representation from each subgroup.
Steps to perform stratified sampling include:
Identify relevant strata within the population. For the community college, these could be based on characteristics like grade level, major, or part-time vs. full-time students.
Randomly sample from each subgroup such that the sample represents the overall population more accurately.
This method is particularly useful if you expect significant variability in opinions or attributes across different subgroups. By doing so, stratified sampling ensures more reliable and generalizable findings.
systematic sampling
Systematic sampling is a method where you select every nth individual from a list after a random starting point:
List all individuals in the population.
Choose a starting point at random.
Select every nth individual from that starting point.
For example, if you decide to sample every 10th student and the random starting point is 5, you would select the 5th, 15th, 25th students, and so on.
This method is easy to implement and can be more efficient than simple random sampling. However, it can introduce bias if there is a hidden pattern in the list order.
sampling techniques
Sampling techniques are methods used to select a portion of a population for study. The main goal is to gather a representative sample:
  • Simple Random Sampling: Each individual has an equal chance.
  • Stratified Sampling: Population divided into strata; random samples taken from each.
  • Systematic Sampling: Every nth individual selected after a random start.

    • Each method has its pros and cons and should be chosen based on the research objective and population characteristics. Choosing the right technique ensures the sample is representative, providing more accurate and reliable results.
educational research methodology
Educational research methodology involves systematic processes used to understand educational systems and practices. Key steps include:
  • Identifying the research question or problem.
  • Choosing a suitable sampling method to ensure representative and unbiased data collection.
  • Collecting and analyzing data to draw meaningful conclusions.
    • In the case of the community college, understanding student opinions on fee increases requires a solid research methodology, which includes selecting an appropriate sampling technique. This ensures that the findings are reflective of the student body and can inform the board's decision effectively.

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Most popular questions from this chapter

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.

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A research objective is presented. For each research objective, identify the population and sample in the study. Folate and Hypertension Researcher John P. Forman and co-workers wanted to determine whether or not higher folate intake is associated with a lower risk of hypertension (high blood pressure) in younger women (27 to 44 years of age). To make this determination, they looked at 7,373 cases of hypertension in younger women and found that younger women who consumed at least 1,000 micrograms per day \((\mu \mathrm{g} / \mathrm{d})\) of total folate (dietary plus supplemental) had a decreased risk of hypertension compared with those who consumed less than \(200 \mu \mathrm{g} / \mathrm{d} .\) (Source: "Folate intake and the risk of incident hypertension among US Women," John P. Forman, MD; Eric B. Rimm, ScD; Meir J. Stampfer, MD; Gary C. Curhan, MD, ScD; Journal of the American Medical Association \(293(2005): 320-329)\)

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