ToothGrowth Analysis

Question: Is vitamin C or orange juice better for tooth growth?

  • The provided App uses the ToothGrowth dataset to help answer this question to ultimately decide which supplement should be used for tooth growth.
  • Required detailed information:
  1. Shiny App
  2. Hypothesis Tests

Analysis performed

Data visualisation:

  • Compares the statistical summaries of the data for the two supplements.
  • Plots the tooth length under different doses for the two supplements.

Hypothesis Tests:

  • Tests the hypothesis that the mean tooth length is equal between Orange Juice and Vitamin C.
  • Tests performed per dose as well as overall.

Outcomes from Analysis

Outcomes from hypothesis tests:

  • For doses 0.5 and 1, there is enough evidence to suggest a difference in the mean tooth length between supplements.
  • For dose 2 (as well as overall) there is not enough evidence to suggest a difference.

Outcomes from data visualisation:

  • For doses 0.5 and 1 Orange Juice appears to promote better tooth growth.
  • For dose 2, there is no evident difference.

Boxplots per dose per supplement

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Conclusion

  • The App provides the necessary tools to answer the question and to suggest which supplement should be used for better tooth growth.

  • If dosages 0.5 or 1 are administered, then Orange Juice is recommended for better tooth growth.

  • If a high dose of 2 is administered, there is little difference between Orange Juice and Vitamin C, and thus the choice of supplement lies with you.