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After the subjects took their showers, 80% of the people that took cold showers had a higher score on the alertness test than before taking a shower.  20% of the people that took a hot shower felt more alert than before the shower.

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The results were astounding. Those with a cold shower tend to be more alert in almost every situation. Those in the control group who took hot showers tend to be slower when it comes to being alert.

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We will have to pay for rental of a gym which costs $32 to rent the gym for a day to complete our experiment. We hired 20 people and paid each of them $10 per hour. We pay the person who records our data, $15 each hour. This experiment took one hour each day and took 25 days to complete. and the total cost was $6175.  (20*10*25=5000) for the workers. (1*15*25=375) for the researcher. (32*25=800) for the gym rental.

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The control group would be people who take a hot shower. There is no placebo in this experiment.

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We used the SRS on our calculator to choose 500 people randomly out of the people that responded not feeling alert. Lurking variables could be the amount of sleep they got last night, how athletic the subjects are.

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When we split the groups into two random groups, the difference in alertness was 8%. There was a 60% difference when the subjects were split into the treatments they received. With a 4% margin of error, our results are statistically significant.

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Out of the people who responded that they do not feel alert, we gathered another 250 males and females and did the same experiment.

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Our sample size is 500, and our margin of error would be 4.47%.

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Each subject will take either hot or cold showers, on their first day, and 2 days later they will take the treatment they didn’t take the first day. Each subject will take both treatments.

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We will match the different subjects we gather between their level of schooling and gender.

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We will have two blocks, divided by gender.  One block with 250 males, and the other with 250 females. Within each groups, they will receive different treatments.

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We can’t blind the subjects, because as soon as the water comes out, they will know if it is hot or cold. To double blind it, the person that adjust the water temperature, and the person that records the response must be different.

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Alertness of the subject after taking a shower.  For the alertness test, we threw 10 balls at them, and recorded the amount of balls they caught. We did the same test before they took a shower as well.

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Temperature of shower

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Hot shower vs cold shower

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Effects of a cold shower on alertness

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How will a cold shower effect one’s alertness?

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We will take a survey of the school and have people respond on whether they feel alert or not. Out of all the people that responded with not feeling alert, 250 males and 250 females will be randomly selected.