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A large tire manufacturing company has claimed that its top line tire will average more than 80,000 miles. If a consumer group wished to test this claim, the research hypothesis would be: Ha : μ > 80,000 miles.
Unmarried Men
Males who have never entered into a legal marriage, including those who are single, divorced, or widowed.
Lurking Variables
Variables that are not directly studied within an experiment but can affect the outcome of the study or the relationship between studied variables.
Confounding Variables
Variables that the researcher failed to control, or eliminate, damaging the internal validity of an experiment by potentially influencing the dependent variable.
Random Assignment
A method used in experiments to assign participants or items to different groups in a way that each has an equal chance of being in any group.
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