Examlex
In testing differences between means,the _____ hypothesis would suggest the population means are different.
Study
An organized investigation or analysis aimed at discovering new knowledge or understanding existing knowledge in a systematic way.
Observational Studies
Research methods in which subjects are observed in their natural setting without any manipulation by the researcher.
Researchers
Individuals or professionals who conduct detailed study and systematic investigation into something with the aim of discovering or revising facts, theories, applications, etc.
Control
In an experiment, a standard against which the results of a test are compared; controls are kept constant to isolate the effect of the independent variable.
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