Any measurable conditions, events, characteristics, or behaviors that are controlled or observed in a study are called
a. hypotheses.
b. correlations.
c. variables.
d. confounds.
C
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How do most researchers currently view menopause?
A. It is responsible for producing the majority of mood disorders in middle adulthood. B. It is regarded as a normal part of the aging cycle. C. It is responsible for increased diagnosis of anxiety attacks among middle-aged women. D. It produces severe irritability.
A sample of n = 16 scores is selected from a population with ? = 80 with ? = 20. On average, how much error would be expected between the sample mean and the population mean?
A) ?20 points B) ?5 points C) ?4 points D) ?1.25 points
The significance of Galvani's experiment involving stimulation of an isolated frog muscle is that it proved that
A) fluid flow along nerves causes muscles to contract. B) the muscles are activated by electrical nerve signals. C) reflexes can be explained using a hydraulic model. D) a reflex is a process controlled by the mind. E) the mind controls the movements of the body.
In a correlation analysis both variables are random; in a regression analysis one is fixed.
a. true b. false