We want to compare the scores of different groups on a measure of reaction time. Three different groups were studied: patients with recent head injuries, patients with head injuries that occurred a year ago, and a control group of non-injured people. We want to know which group of people has the fastest reaction time. What is the best statistical test to use to find this out?
a. one way ANOVA
b. factorial ANOVA
c. paired samples t-test
d. correlation
A
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Cain and Judith, both 3 years old, are playing house, which demonstrates __________ play.
A. sociodramatic B. rough-and-tumble C. parallel D. cooperative pretend
Pregnancies can be dated from the onset of the last menstrual period before conception or by
a. assuming conception occurredtwo weeks after the beginning of a woman's last menstrual cycle. b. counting ahead nine months from the date the woman learned she was pregnant. c. counting forward from the date the woman believes she conceived. d. pregnancies are not dated as there is too much variability from woman to woman.
Although the quota system may adequately represent minority groups, it
a. may underrepresent majority groups. b. has to use the same selection procedures for all groups. c. may result in greater failure rates among some groups. d. may not represent the minorities of that particular community.
The adaptation level theory would suggest that long-term happiness is more dependent on:
A. other people's financial success B. enjoying good news and the little pleasures of life C. setting and reaching high goals D. accumulating material things that give us pleasure