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Scientific method

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Scientific method The process by which scientists, collectively and over time, endeavor to construct an accurate (that is, reliable, consistent and non-arbitrary ... – PowerPoint PPT presentation

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Date added: 31 January 2019
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Title: Scientific method


1
Scientific method
  • The process by which scientists, collectively and
    over time, endeavor to construct an accurate
    (that is, reliable, consistent and
    non-arbitrary)representation of the world.
  • http//teacher.pas.rochester.edu/phy_labs/Appendix
    E/AppendixE.html

2
The scientific method has four steps
  • Observation and description of a phenomenon or
    group of phenomena.
  • Formulation of an hypothesis to explain the
    phenomena
  • Use of the hypothesis to predict the existence of
    other phenomena, or to predict quantitatively the
    results of the new observations.
  • Performance of experimental tests of the
    predictions by several independent experimenters
    and properly performed experiments.

3
Central Limit Theorem
  • If a sufficiently large random sample is drawn
    from a population with mean u and variance s2,
    the distribution of samples means will have the
    following characteristics
  • 1. an approximately normal distribution
    regardless of the distribution of the underlying
    population
  • 2. the mean of the sample means will be equal to
    the population mean
  • 3. The variance of the sample means will be equal
    to the population variance divided by the sample
    size.
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