The advantage of squaring the deviation of each score from the mean and then summing is that
A. it makes the sample variance an unbiased estimator of the population variance.
B. it makes the degrees of freedom for sample variance equal to n – 1.
C. it produces a minimal positive solution that is not zero, as long as all scores are not exactly the same value.
D. it makes the sample variance an unbiased estimator of the population variance and it produces a minimal positive solution that is not zero, so long as all scores are not exactly the same value.
Ans: C
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Non-verbal communication
a. is always less powerful than verbal communication. b. includes a variety of practices including considerations of personal space, gesturing, facial expression and vocal cues. c. has little influence over the message in any given communication. d. is only perceived by those who are hypersensitive.
During four years of college, a good student will probably spend
a. fifty hours taking notes. b. dozens of hours taking notes. c. hundreds of hours taking notes. d. very little time taking notes, since he or she is such a good student.
Using a loose-leaf notebook for taking notes allows you to
A. change the page order if necessary. B. give your notes to your friends. C. retype your notes into your laptop. D. use the Cornell method of notetaking.
Skilled readers do not
a. ?pose questions. b. ?separate main points and general principles from supporting details. c. ?list unanswered questions. d. ?think critically. e. ?worry about keeping their textbooks in pristine condition.