Nonparametric statistical tests should be used when the _____
a. assumptions of parametric tests are not met
b. population distribution is normal
c. variances of scores are equal in the populations sampled
d. dependent variable achieves interval measurement
A
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Billy shows high levels of aggression on the playground, and his mother has attempted to determine the cause of his aggression. She has noted several facts about Billy that she thinks could be contributing to these aggressive displays. Which one of the following demonstrates a hormonal cause for his aggression?
A) Billy's father was also very aggressive. B) Billy's doctor found that Billy has exceptionally high levels of testosterone. C) Billy's friends are also very aggressive boys. D) Billy's mother consumed a great deal of alcohol when she was pregnant with Billy. E) Billy watches a lot of violent cartoons.
In addition to the mental workload of pilots, heart rate is also associated with
a. heart-rate variance. b. the brain wave index. c. ¬physical activity. d. the experimental design.