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In the morning does coffee or water have a better effect on increasing productivity and energy?

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We get 75 students from each grade at Boulder Creek High School and for one week have them drink water in the mornings, then the next week drink coffee in the mornings, and the third week have them drink nothing in the mornings, they will record how much energy they have after the beverage has been consumed

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We asked for volunteers as students enter the school if they would like to be in our study offering free water and coffee

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100 students a week when they wake up will either drink water ,coffee or nothing, after a week the students cross over and switch beverages. After a three week period every student will of tried each treatment for a week

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Our explanatory variable was which treatment each unit received water or coffee or none

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At the end of the three weeks we calculated the average energy of a 1-10 scale of each beverage

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We had the school give each student a number and used a random number generator to decide where each student started. Lurking Variables could be amount of sleep, breakfast, and time they wake up.

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Our control group is the week that nothing is consumed in the mornings, this allows us to know their average energy level with nothing added to it. We don’t have a place as it would serve no purpose.

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We are not able to blind subjects as they know the clear differences between coffee and water, there is no double blind because we must know what each student drinks in order to compare

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This is a crossover design because we have subjects moving from water, to coffee, to nothing, this allows us to see get rid of individual problems about certain people and we can track of their energy changes between treatments

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We have a sample size of 300 and our margin error is about 5.8%. Having a low margin of error is good because it means I’m getting close to the majority of the population

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We can replicate this study with another 300 people from different school or work to confirm if it is accurate information. We could do a study with older people with less energy next time

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After three weeks of gathering data we found that people who drink coffee in the mornings have more energy then those who drink water, however those who drink water have more energy than those who don’t drink anything in the mornings, the average amount of energy people had after coffee was 8, then 6 for water, and 3 for nothing.

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This is statistically significant as there is a large enough difference in averages that it couldn’t be a coincidence making it sign

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Peoples morning routine were changed as more people changed to coffee to get more energy