Data Collection Methods and Interval Level Data

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Questions and Answers

What was the primary focus of the medical study mentioned?

  • The role of aspirin in heart attack prevention (correct)
  • Comparative analysis of surgical methods
  • Long-term effects of cholesterol on heart health
  • The effectiveness of various pain relievers

Which groups were the volunteer physicians divided into for the study?

  • Control group and treatment group (correct)
  • Active treatment group and placebo group
  • Experimental group and observational group
  • Placebo group and treatment group

Which of the following is NOT a method for obtaining data?

  • Data from a survey
  • Data from an informal discussion (correct)
  • Data from a designed experiment
  • Data from a published source

What aspect of the study design could potentially introduce bias?

<p>The use of volunteer physicians (D)</p> Signup and view all the answers

Which method is likely to provide data generated through scientific controls?

<p>Data from a designed experiment (D)</p> Signup and view all the answers

What is a possible limitation of using a control group in this study?

<p>Participants in the control group may experience placebo effects (C)</p> Signup and view all the answers

If a researcher wants to gather personal opinions on a topic, which method would be least effective?

<p>Data from a designed experiment (A)</p> Signup and view all the answers

What might be a significant implication of the study if it finds aspirin effective?

<p>It could change clinical guidelines for heart attack prevention (C)</p> Signup and view all the answers

When aiming for a broad understanding of a population's characteristics, which data collection method is most appropriate?

<p>Data from a survey (C)</p> Signup and view all the answers

Which source of data might provide previously analyzed and verified information?

<p>Data from a published source (D)</p> Signup and view all the answers

Flashcards

What was the study's focus?

The main goal of the medical research was to determine if aspirin could prevent heart attacks.

How were the physicians divided?

The participants were divided into two groups: one group received aspirin (treatment group), and the other group didn't (control group).

What's NOT a valid data collection method?

Casual conversations or informal discussions are not considered reliable data sources in scientific research.

What could be a source of bias?

The fact that the physicians were volunteers raises concerns about potential biases, as they might be more health-conscious than a random group.

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Which method provides controlled data?

Scientific experiments are designed to isolate and measure specific variables, providing controlled and reliable data.

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What's a possible limitation of a control group?

The control group might experience a placebo effect, where they believe they are receiving a treatment and feel better even though they aren't.

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What's a potential implication of aspirin's effectiveness?

If the study proves aspirin's effectiveness, it could significantly impact the way doctors recommend heart attack prevention.

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What is most appropriate for understanding a population?

Surveys are best suited for collecting data about a large population, providing a broad overview of perspectives and characteristics.

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Where to find validated information?

Published sources often contain pre-analyzed and reviewed information, offering a source of verified and reliable knowledge.

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Why are informal discussions not effective for gathering opinions?

Gathering personal opinions through informal discussions or casual conversations is not a structured or controlled method of data collection.

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Study Notes

Data Collection Methods

  • Data can be obtained from published sources, designed experiments, surveys, or other methods.
  • A medical study can be used to demonstrate data collection through a designed experiment.
  • Volunteers were divided into treatment and control groups to investigate the potential of aspirin to prevent heart attacks.

Surveys

  • Surveys involve sampling a group of people, asking them questions, and recording their responses.

Interval Level Data

  • Interval level data is numeric.
  • The difference between two ranked values is meaningful.
  • There is no natural zero point.
  • Examples of interval level data include temperature and foot size.
  • Interval data can be used to represent student data, salary data, or other numeric data.

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