An example of a randomized controlled experiment is when
A) households receive a tax rebate in one year but not the other.
B) one U.S. state increases minimum wages and an adjacent state does not, and employment differences are observed.
C) random variables are controlled for by holding constant other factors.
D) some 5th graders in a specific elementary school are allowed to use computers at school while others are not, and their end-of-year performance is compared holding constant other factors.
Question 2
Studying inflation in the United States from 1970 to 2006 is an example of using
A) randomized controlled experiments.
B) time series data.
C) panel data.
D) cross-sectional data.
Field experiment on effects of predation on male guppy colouration
Client on IV patient-controlled analgesia (PCA).
A medical assistant holds a specimen container to receive a biopsy sample.
The citric acid cycle controlled by NAD+ and NADH
Controlled Scientific Experiments Scientists use experimental research to test hypotheses
The Experiment at Robbers Cave