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. Dependent variable
(y-axis)
Independent variable
(x-axis)
Dependent variable
(y-axis)
Dependent variable
(y-axis)
Independent variable
(x-axis)
Independent variable
(x-axis)

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