Dology
Which sentence best states the importance of using control groups?
Control groups provide a method by which statistical variability
can be reduced
Control groups allow comparison between subjects receiving
a treatment and those receiving no treatment
Control groups eliminate the need for large sample sizes,
reducing the number of measurements needed.
Control groups eliminate the need for statistical tests and
simplify calculations.

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on the planet jupiter, the acceleration due to gravity is approximately 26 m s2 , roughly 2.7 times the acceleration due

allowed for the prediction of the properties of missing elements.