SQUID sensors are used in
a. positron emission tomography (PET) scans
b. functional magnetic resonance imaging (fMRI).
c. magnetoencephalography (MEG).
d. electroencephalography (EEG).
c
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Which type of scale has magnitude and equal intervals, but does not have an absolute zero?
a. Ordinal b. Nominal c. Ratio d. Interval
Twin studies suggest that heritability explains ____ of the variation in aggression in children
a. less than one quarter b. between about a quarter and a third c. between about a third and a half d. between about a half and two thirds
Which statement concerning secondhand smoke is true? a. There is no evidence that secondhand smoke leads to any health problems
b. Secondhand smoke exposure can lead to death. c. Less than one-fifth of Americans have been exposed to secondhand smoke. d. Nonsmokers exposed to secondhand smoke are more likely to die from lung cancer than from cardiovascular disease.
If, in a randomized ANOVA, there are three groups with 10 participants in each group, the df for the F-ratio is equal to a. 30
b. 29. c. 2, 27. d. 2, 28.