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Variable
any factor that can have more than one value
Constant
factors in an experiment that do not change
Qualitative data
uses words to describe what is observed
Quantitative data
uses numbers to describe what is observed
Control group
contains the same factors as the experimental group, but the independent variable doesn’t change
Independent variable
is the factor you want to test. Is changed by the investagoter to observe how it affects a dependent variable
Experimental group
used to study how a change in the independent variable changes the dependent variable.