Statistics and Biostatistics Khaloo
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Questions and Answers

What is the primary focus of the field of statistics?

  • Forming hypotheses and designing experiments
  • Developing new statistical methodology
  • Making sense of data arising from random processes or phenomena (correct)
  • Collecting and analyzing data

    • What is the main difference between mathematical statistics and applied statistics?

  • Mathematical statistics is used for data analysis, while applied statistics is used for data collection
  • Mathematical statistics focuses on theory, while applied statistics focuses on real-world problems (correct)
  • Mathematical statistics is more theoretical, while applied statistics is more practical
  • Mathematical statistics deals with biology, while applied statistics deals with health sciences

    • What is a data set?

  • A collection of observations of random variables (correct)
  • A sample of a population
  • A single observation of a random variable
  • A population of all possible values of a variable

    • What is the difference between a quantitative variable and a qualitative variable?

    <p>Quantitative variables can be measured, while qualitative variables cannot</p> Signup and view all the answers

    What is a population in statistics?

    <p>A collection of all possible values of a variable</p> Signup and view all the answers

    What is the primary focus of biostatistics?

    <p>Applying statistical methods to applications in health sciences and biology</p> Signup and view all the answers

    What is an example of a qualitative variable?

    <p>Gender</p> Signup and view all the answers

    What is the primary goal of summarizing data?

    <p>To understand and make sense of the data</p> Signup and view all the answers

    What is a variable in statistics?

    <p>An object, characteristic, or property that can have different values</p> Signup and view all the answers

    What is the difference between a sample and a population?

    <p>A sample is a part of a population, while a population is the collection of all possible values</p> Signup and view all the answers

    Study Notes

    Statistics and Biostatistics

    • Statistics is the study and use of theory and methods for the analysis of data arising from random processes or phenomena.
    • It involves making sense of data and provides fundamental tools and techniques of the scientific method.
    • Statistics involves:
      • Forming hypotheses
      • Designing experiments and observational studies
      • Gathering data
      • Summarizing data
      • Drawing inferences from data and testing hypotheses

    Divisions of Statistics

    • Mathematical Statistics: studies and develops statistical theory and methods in the abstract.
    • Applied Statistics: applies statistical methods to solve real problems involving randomly generated data and develops new statistical methodology motivated by real problems.

    Biostatistics

    • Biostatistics is the branch of applied statistics directed towards applications in the health sciences and biology.
    • It involves the application of statistical methods to solve problems in health sciences and biology.

    Data and Variables

    • Data: observations of random variables made on the elements of a population or sample.
    • Data can be quantities, numbers, or qualities, attributes measured or observed, and collected and/or analyzed.
    • A collection of data is often called a data set.
    • Variables:
      • Can be quantitative (measurable): heart rate, heights, weight, age, size of tumor, volume of a dose.
      • Can be qualitative (categorical): gender, race, drug name, disease status.

    Populations and Samples

    • A population: the collection or set of all of the values that a variable may have.
    • A sample: a part of a population.

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    Description

    Learn the basics of statistics, including data analysis, experiment design, and hypothesis testing. Understand the divisions of statistics and its applications.

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