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In order to test reliability of these results, we will duplicate this experiment with 60 new participants.

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The study concluded that the armpits that had Old Spice applied to it reported to be statistically significant in effectiveness when eliminating the smell of body odor.

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With a sample size of 60 students (15 per grade level), the margin of error is 13%.

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I will be using crossover design due to the fact that it is the most efficient to use two types of deodorant on one individual’s armpits to understand how it affects an individual and their odor.

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These could possibly include amount or lack of physical activity, a medical condition, age, etc.

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The participants will be unaware of which deodorant is Old Spice and which is the placebo; both will have the same smell.

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Each participant will receive the name brand deodorant, as well as a "fake" in order to see if the name brand actually makes a difference in body odor. The participants will apply both deodorants as normal, without knowing which is which. The "fake" deodorant will not have any active ingredients, causing it to not actually work.

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The effectiveness of deodorant.

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This variable includes which treatment is done to each armpit, whether or not it is an actual deodorant.

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Of the 60 participants, each will be assigned to use both Old Spice deodorant and the placebo, or "fake", deodorant, applying one per armpit.

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15 students from each grade level will be randomly selected when looking at a list of all students. Overall, the participants include: 15 freshmen, 15 sophomores, 15 juniors, and 15 seniors.

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60 randomly selected participants from my high school.

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To determine whether or not deodorant masks/eliminates the smell of body odor.

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Old Spice Deodorant's ability to mask and/or eliminate body odor.