The obtained t equals 3.672, and the critical t equals 2.481 . The researcher should _____
a. reject the null hypothesis c. accept the null hypothesis
b. reject the alternative hypothesis d. test a post hoc hypothesis
A
When the obtained t is greater than the critical t, the null hypothesis is rejected.
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In an experiment, the treatment or experimental group is exposed to the independent variable being studied; the control group is not.
Answer the following statement true (T) or false (F)
Regarding handedness, which of the following statements is FALSE?
a. Left-handers have performed well in a variety of professional sports including boxing, fencing, handball, and tennis. b. Those who are extremely gifted in math are much more likely to be left-handed or ambidextrous with lefties even excelling at ordinary arithmetic skills. c. The physical size and shape of the two cerebral hemispheres of left-handed persons is more alike than that of right-handed persons. d. Individuals who are consistently right-handed seem to have better than average pitch memory.
Which one of the following suggestions for group leaders would NOT prevent groupthink but encourage it?
a. Invite someone in the group to play devil's advocate. b. State your personal preference at the beginning of the meeting. c. Make sure group members know that they will be held accountable for the decisions. d. Have a "second chance" meeting to re-evaluate important decisions.
A(n) ______ is a testable claim or statement concerning the relationship between variables that can be observed.
A. variable B. statistic C. operational definition D. research hypothesis