The best way to reduce the variances in the distributions of means when conducting a t test for independent means is to
A) increase the size of the samples.
B) raise the study's level of significance.
C) use the true population variance.
D) treat the two samples as one sample.
A) increase the size of the samples.
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Studies of the immune system in humans have found that stress
a. can lead to increased levels of immune activity. b. has very little effect on immune activity. c. can lead to decreased levels of immune activity. d. decreases autonomic nervous system function.
Kylee used to bring drawings home from her kindergarten class every day. Her parents would put the pictures on the refrigerator and tell Kylee how nice the pictures were. Lately, her parents haven't been putting her artwork on the refrigerator, and now Kylee has stopped bringing drawings home with her. This example illustrates the operant conditioning process of
a. punishment. b. avoidance. c. resistance. d. extinction.
In order to qualify for sex reassignment surgery, candidates must be stable in all of the following ways EXCEPT
A. psychologically. B. financially. C. socially. D. physically
Which type of thinking tends to be measured by most IQ and achievement tests?
a) divergent thinking b) convergent thinking c) creative thinking d) unorthodox thinking