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MPH6107 - Foundation Biostatistics (4.00 Credits)
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A survey includes 200 participants, but only 180 report their smoking status. Of those 180, 45 are current smokers. What percentage should be reported as current smokers among participants with known smoking status?
Two districts have 200 and 100 malaria cases, respectively. Their populations are 100,000 and 20,000. Which presentation allows a fair comparison of annual malaria incidence, assuming comparable surveillance?
In a standard box plot, what does the box represent?
Which feature usually distinguishes a histogram from a bar chart?
An analyst presents the same five category counts in a table and an identical bar chart, with no additional information. Which revision would usually improve a concise report?
A bar chart shows vaccination coverage of 80% and 85%, but its vertical axis begins at 79%. What is the principal concern?
A researcher wants to compare the number of nurses employed at six health centres. Which graph is most appropriate?
What is the proper graph to present the data from the following table?
A table reports causes of death as percentages of all deaths. Which information is most important for interpreting these percentages?
When presenting data in a graph, the legend: