Examlex
What health risks are associated with the application of temporary tattoos that use henna and other dyes?
Experimental Study
A research method where the investigator manipulates one or more variables to determine their effect on a dependent variable, often involving control groups.
Observational
Pertaining to data or a study method where the researcher observes subjects without manipulating any variables.
Nominal Scale
Refers to a classification system in statistics where data can be divided into non-numeric categories that are labeled or named; there is no intrinsic ordering to the categories.
Mikhail Gorbachev
The last leader of the Soviet Union, known for implementing reforms that contributed to the end of the Cold War.
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