Is the statement sufficient?
Eight participants in a psychology experiment are given different amounts of money at the beginning of the experiment. Will the average (arithmetic mean) amount of money each participant has at the end of the experiment be higher than, lower than, or equal to the average that each participant had at the beginning of the experiment?
1) Half of the participants are asked to give 20% of the original money back, while the other half are given an additional 25%.
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