Noah is doing an experiment to see the effects of training o…

Noah is doing an experiment to see the effects of training on learning. One group of employees receives the training, while the other (control) group does not. He then gives the employees a job knowledge test. He wants to compare the mean job knowledge test score of the two groups. The best statistic to use for this would be _____.

Rocio manipulates the level of stress that participants are…

Rocio manipulates the level of stress that participants are exposed to, such that one group of 50 participants are randomly assigned to a low stress condition and another group of 50 participants are randonly assigned to a high stress condition. He later measures the participants’ performance on a memory test. What is the independent variable (IV) in this example?