Which of the following assumptions are common to all parametric statistics?
a. There are no common assumptions.
b. The population of dependent scores forms a normal distribution, regardless of what kind of scores they are.
c. The dependent scores must be interval or ratio scores, regardless of whether the population of scores forms a normal distribution.
d. The population of dependent scores (a) must be interval or ratio scores and (b) must form an approximately normal distribution.
d
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An increased risk of developing schizophrenia is associated with
a. the mother experiencing obstetric complications. b. being born during the late summer months. c. a child born to a mother who experienced alcohol withdrawal. d. having an elderly father. e. being born in the fall months.