Question

which of the following best states the importance of using control groups? * 1 point control groups allow comparison between subjects receiving a treatment and those receiving no treatment. control groups eliminate the need for statistical tests and simplify calculations. control groups eliminate the need for large sample sizes, reducing the number of measurements needed.

Explanation:

• First option: Control groups in experiments are used to compare treated and non - treated subjects to assess treatment effects.
• Second option: Control groups don't eliminate statistical tests; stats are still needed for analysis.
• Third option: Control groups don't reduce the need for large sample sizes; sample size is about accuracy, not controlled by control groups.

Answer:

A. Control groups allow comparison between subjects receiving a treatment and those receiving no treatment.