The freshmen competed with the sophomores to see who could raise the most money by recycling. The appropriate design for testing the significance of the difference between the means is
a. related-samples t-test.
b. independent-samples t-test.
c. one-sample t-test.
d. z-test.
b
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For a normal distribution
a. all of the data points lie within one standard deviation from the mean. b. about 2/3 of the distribution lies within one standard deviation from the mean. c. about 95% of the distribution lies within two standard deviations from the mean. d. both b and c
From her studies of chimpanzees in the wild in Tanzania, Jane Goodall showed that humans are not the only tool- making animals
In discovering this information, Jane Goodall used which type of research method? a. field experiments b. experimental control c. correlational studies d. naturalistic observation
What type of reference is illustrated by the sentences below?
I tried on the red shoes. The heels were too high. a) Necessary part b) Optional roles c) Reasons d) Consequences
Administering a test to a group of individuals, readministering that same test to the same group at a later time, and correlating test scores at times 1 and 2 demonstrates which method of estimating reliability?
a) test-retest method b) alternate forms method c) split-half method d) internal consistency method