The freshmen competed with the sophomores to see who could raise the most money by recycling. The appropriate design for testing the significance of the difference between the means is
a. related samples t-test. c. one-sample t-test.
b. independent samples t-test. d. z-test.
B
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Which of the following is NOT one of the key categories of symptoms for diagnosing autism?
a. Qualitative impairment in social interaction b. Qualitative impairment in communication c. Qualitative impairment in adaptive skills d. Restricted, repetitive, and stereotyped patterns of behavior, interest, and activities
Putting on an angry face has what effects on heart rate and skin temperature?
a. raises both b. lowers both c. raises the heart rate and lowers the skin temperature d. lowers the heart rate and raises the skin temperature
Patty is outgoing, sociable, and assertive. According to the five-factor model, what does she demonstrate?
a. openness to experience c. agreeableness b. conscientiousness d. extraversion
The core of ethical principles in research is that:
a. a scientist is autonomous and can make value judgments without interference from outside sources. b. the participant's rights are always more important than the scientist's right to know. c. participants should not be harmed. d. the scientist's right to know are always more important than the participant's rights.