What is the main difference between Z score and t score?
A) t scores are used when the study requires a one-tailed test
B) t scores are used when the population variance is unknown
C) t scores are used whenever the sample size is greater than 30
D) t scores are only used when inferences are made about other samples
B
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The formal organization that directs the political life of a society is
a. the economy. b. politics. c. religion. d. government.
The most critical issue in the anti-Chinese movement of the late nineteenth century was ________
a. labor market competition b. race c. brain drain d. land rights
Despite opposition, the Supreme Court made abortion legal in the United States. This illustrates the court's __________
A) deterrence B) retribution C) power D) incapacitation
The most recent results from the Trends in International Mathematics and Science Study indicate that a. U.S. students score above the international average in science
b. the United States ranks at the very top of the nations on all measures. c. the United States has the highest high school graduation rate. d. the United States ranks first in college completions.