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Mathematics, 25.03.2020 21:37 asialovepink2321
If a researcher wishes to determine whether there is evidence that the mean family income in the U. S. is greater than $30,000, then:
A. a one-tailed test should be used, in which the region of rejection is in the left (lower tail)
B. a one-tailed test should be utilized, in which the region of rejection is in the right (upper tail)
C. a two-tailed test should be used either a one-tailed or a two-tailed test could be used
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