Is the amount of daily caffeine intake related to weight of adult females?

Is the amount of daily caffeine intake related to weight of adult females?

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To find out using statistical analysis if the amount of daily caffeine intake is related to weight of adult females.

Purpose of the study

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Using the quantitative variables weight (in pounds) and amount of caffeine consumed per day (in milligrams), we collected data from 40 randomly selected adult females in Salt Lake City.

To ensure randomness, we made sure our data came from adult females with different occupation e.g. Office personnel, manufacturing personnel, students etc.

Study design

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To ensure anonymity, the team has used an online survey that was created.

To avoid non-response bias, the team has also used a form with some marked dummy data to help with anonymity where subjects were able to fill in their information.

Note: Dummy data has been discarded during analysis

Data collection

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Since the subjects did not know the amount of caffeine they consume per day, we asked them to tell us how many caffeinated drinks they consume per day. That data has later been translated into milligrams of caffeine using:http://www.energyfiend.com/the-caffeine-database

Example: 8oz Green Tea = 25mg caffeine

Data translation

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Weight statistics

(lb) (lb)

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Caffeine statistics

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Scatterplot

y = 162.27783 – 0.024031745 (Caffeine Intake)

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Although weight in the sample size seems to be normally distributed, the caffeine intake is skewed to the right. It would be misleading to say that there is a direct correlation between the two variables by looking at this sample size. A greater sample size could give a better resolution and ultimately a more accurate picture of the correlation between the two variables, but as this statistical analysis is showing, there is no solid correlation between these two variables.

Results

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Critical Value = 0.304 Linear Correlation Coefficient (r) = -0.1011

Since r = -0.1011 is less than the critical value of 0.304,

we can conclude that there is no significant relationship

between daily caffeine intake and the adult female weight, therefore, we can say that the daily caffeine intake is not related to the adult female weight.

Conclusion

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Graphs

Data Collection

Results/Conclusion

PowerPoint

ContributionsDaneila Sarah

ShannonMuris