One sample has n = 10 scores and a variance of s2 = 20, and a second sample has n = 15 scores and a variance of s2 = 30.What can you conclude about the pooled variance for these two samples?
A) ?It will be closer to 20 than to 30.
B) ?It will be closer to 30 than to 20.
C) ?It will be exactly half way between 20 and 30.
D) ?It will be equal to 25.
B
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Eli grew up in an impoverished neighborhood and had friends who never went to school and ended up in prison. He finished high school while holding down a full-time job at night. He has put himself through college while working and caring for his ailing parents. Throughout the challenges, Eli always believes that things would work out for the best. Eli is displaying ____.?
a. ?a self-serving bias b. ?dispositional optimism c. ?a Type A personality d. ?the actor-observer bias
Which of the following studies is best for showing the first variable produces a change in the second variable?
a. A researcher asks people who are entering the grocery store how hungry they are and then asks them how much they spent on food as they leave the store. b. A researcher has participants sleep various amounts of hours and then observes how cranky they are. c. A researcher asks participants how well they like to think and how many books they have read in the last 6 months. d. A researcher asks participants how many hours per week they listened to Beethoven while growing up and then gives them a math ability test.
John Watson's behaviorism and John Locke's concept of tabula rasa:
a. have nothing in common. b. both suggest that one's genetic endowment determines one's ideas, preferences, and skills. c. both suggest that experience determines one's ideas, preferences, and skills. d. emphasize the importance of maturational processes.
What is the common name for the effect referred to in the previous question?
(a) acoustic code (b) maintenance rehearsal (c) serial position effect (d) elaborative rehearsal