Author Question: Experiments use __________ to reduce the effects of confounding variables and other sources of bias ... (Read 33 times)

danielfitts88 · **on:** Jul 24, 2018

Experiments use __________ to reduce the effects of confounding variables and other sources of bias that are naturally present in observational studies.
Fill in the blank(s) with correct word

Question 2

Which of the following is implemented in an experiment to reduce known sources of natural variability in the response variable, so that differences due to the explanatory variable can be detected more easily?
a. Matched-pairs
b. Repeated measures
c. Blocks
d. All of the above