If your observed F isn't bigger than your critical F, what can you conclude?

The neuropsychology evidence on the imagery question shows that

a. imagery and perception involve entirely different biological processes . b. during mental imagery, some portions of the visual-processing regions of the cortex seem to be activated. c. the primary similarity between imagery and perception is that the visual receptors in the retina are stimulated in both cases. d. the neuroscience research in this area has a major problem with demand characteristics, so we cannot draw clear-cut conclusions.

Before beginning a study on the health effects of obesity, a group of researchers agree that, for the purposes of their research, anyone with a Body Mass Index greater than 30 kg/m² will be considered obese. This is an example of _______________

A) a confounding variable B) an operational definition C) convenience sampling D) an appeal to common sense