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Components%20of%20Experiments

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Components of Experiments Components of Experiments a. Variables (i) Independent/Manipulated Variable changed by the investigator (ii) Dependant/Responding ... – PowerPoint PPT presentation

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Title: Components%20of%20Experiments


1
Components of Experiments
2
  • a. Variables
  • (i) Independent/Manipulated Variable changed
    by the investigator
  • (ii) Dependant/Responding Variable variable
    that is measured, counted or recorded by
    investigator

3
If I do ____________________ then
_____________ will result. the effect with be
____________.
4
(No Transcript)
5
  • a. Variables (continued)
  • (iii) Standardized Variables variables that
    are kept equal in all treatments so that any
    changes in the dependent variable can be
    attributed to the independent variable

6
  • b. Treatment the one where the independent
    variable is manipulated
  • c. Control that which does not receive
    treatment in the experiment.

7
  • d. Randomization choose samples randomly to
    avoid bias.
  • e. Sample Size The number of organisms that are
    experimented on.
  • f. Replication The number of times you do the
    experiment over time the more samples you have
    the better the results.

8
g. Size of Scope of Study (i) Lab (ii)
Small-scale field (iii) Large-scale field
9
  • h. Accuracy how close a measurement value is to
    the true value.
  • i. Precision how close the measured values are
    to each other.

10
Good accuracy and good precision
Poor accuracy and poor precision
Poor accuracy and good precision
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