A collection of biostatistics exercises and their solutions using R-Studio, covering statistical tests, hypotheses, and data analysis.
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[...] Means and standard deviations Note: I use a new aggregate function here to avoid a command per group b. Box plots c. Statistical test Hypotheses: Orders for the test Note: we can check if the variances are equal with the command Command for the test itself: We reject , there is a significant difference in weight between the two groups. Exercise 5. 1. Formulation of hypotheses 2. Test 3. Conclusion , on accepte Births in England and Wales in are in line with the theoretical proportion Exercise 6. a. b. Exercise 7. a. For men For women b. [...]
[...] Conclusion of the test On rejects The average difference being positive: It can be said that there was a significant increase in the number of vines between 1998 and 2012. Exercise 2. 1. Interval at [...]
