What are the assumptions of the t test?
What will be an ideal response?
The t test is based on a bell-shaped symmetrical distribution; interval or ratio data; sample size of 30 or less; and knowing m.
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DSM-5 describes personality disorders in terms of discrete categories. Discuss the limitations of this approach
Answer:
Harper is 35 years old and has just enrolled in his first university course. On the first day of class, he looks over the individuals in the room and sits next to another male student who appears to be in his early thirties. In this case, Harper has likely classified the other student
a. using a self-serving bias. b. as a member of his ingroup. c. as the teaching assistant for the class. d. as someone who has more university experience than Harper.
P.W. Herman wants to know whether consumption of alcoholic beverages affects peoples' bicycling abilities. He suggeststhat the alcohol itself doesn’t have any negative effects, but that people who drink alcohol expect to have their riding abilities impaired so they "act drunk." To control for the participants' expectations, P.W. gives half of his sample vodka and the other half of his sample
vodka-flavored water. P.W. is using a(n)____research method, and the vodka-flavored water is a ____.? a. ?naturalistic observation; confounding variable b. ?survey; confounding variable c. ?experimental; placebo d. ?experimental; treatment variable
If a researcher finds a negative correlation between the number of hours that students play computer games and grades, we can conclude that
a. computer game playing causes a decrease in grades. b. computer game playing causes an increase in grades. c. lower grades cause a student to be disinterested in studying and more interested in playing computer games. d. an experiment would have to be performed to establish a cause-and-effect relationship between video game playing and grades.