Below, you will find short descriiptions of 3 studies. For each one, provide the following:
The conceptual hypothesis.
The research hypothesis.
The null hypothesis.
A. A research team is interested in the relationship between personality and aggression. With a survey, an investigator records various behavioral and personality variables of a group of participants. Among the variables, the investigator specifically evaluates the relationship between each respondent’s Neuroticism score and the respondent’s reported number of arrests for violent crimes.
B. A research team is interested in the relationship between stimulation and performance. An investigator administers, to 4 groups of participants, 4 doses of a new stimulant drug named HUBUPROFEN (each group gets one of: 0mg, 20mg, 40mg, 60mg). Afterward, the investigator measures performance on a whack-a-mole game, where the data indicate the number of moles whacked per minute.
C. A research team is interested in the relationship between gender and altruism. An investigator observes women and men in the local shopping mall. The investigator records the number of times each person holds the door open for someone else. The investigator then compares the women and men, on the total number of times they hold doors open.
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