Components%20of%20Experiments

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

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If I do ____________________ then
_____________ will result. the effect with be
____________.
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(No Transcript)
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• 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

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

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• 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.

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

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