If both samples have the same number of scores (n), then the independent-measures t statistic will have df = 2n - 2
Indicate whether the statement is true or false
True
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Comparing divorce rates within the first 10 years of marriage, what is true regarding divorce rates of couples married in the 1970s and couples married in the 1990s?
a. The percentage of couples that divorced within the first 10 years increased from the 1970s to the 1990s. b. The percentage of couples that divorced within the first 10 years was about the same between both groups. c. The percentage of couples that divorced within the first 10 years decreased from the 1970s to the 1990s. d. Due to changes in divorce laws, comparisons between these groups are not valid.
Which of the following effects on the reproductive system has research shown to be associated with chronic marijuana use
a. decreases in the number of sperm in men b. nonovulatory menstrual cycles in women c. decreases in sperm motility in men d. all of these e. none of these
Which area of the brain may be involved in ecstatic religious experiences and some types of epilepsy?
A. the right frontal lobe B. the right parietal lobe C. the right anterior temporal lobe D. the right superior frontal lobe E. the left and right frontal lobes
Claustrophobia is described as a fear of
a. flying. c. aliens. b. spiders and snakes. d. enclosed spaces.