PSYCH 228 Questions and Answers

PSYCH 228 Questions and Answers Look at the following math SAT scores: 520, 500, 480, 480, 510, 480, 530, 550, 600, 490, 770, 500, 480. What is the mean of this data set? ANSWER 530 A count of the number of cigarettes a person smokes in a day is an example of ___. (Check all that applies. ANSWER ratio variable discrete variable Sokka wanted to know whether birth month had an affect on academic achievement of elementary students in poverty. What level of variable is birth month? ANSWER ordinal Lauren is interested in birth succession and its possible effects on personality as measured by the big 5 personality test. She gives a math test out of 100 points and the personality test to male and female participants. Is there an ordinal level variable in her study? Please choose the best answer. ANSWER yes, birth succession What does a very small standard deviation tell you? ANSWER It means that the data points tend to be close to the mean. Researchers conducted an experiment on test anxiety with three groups. In the first group, the students studied for only 20 minutes and then took an exam. The second group studied for one hour and then took an exam. The third group spent several hours studying before taking the exam. In this experiment, the independent variable is: ANSWER Amount of time spent studying In a study, researchers discovered that as the number of hours spent watching television increased, grades decreased. This study is an example of what type of research method? ANSWER correlational