Percentages
Yes, let's start with the basics:
What are the typical mistakes people make with percentages? What is the margin of error in a poll?
It would be virtually impossible to conduct a poll on the entire voting population in the United States. Pollsters therefore question a sample of a population. What is the difference between causation and correlation?
One of the most common errors we find in the press is the confusion between correlation and causation in scientific and health-related studies.
What does it mean for a result to be “statistically significant”?
How can we tell whether two events happen at the same time by chance, or for a reason? What is the difference between absolute and relative risk?
Which one tells you about the actual risk ?
What is the difference between controlled, observational and case controlled studies?
There are advantages and disadvantages to each type, and an awareness of these differences makes for a savvier consumer of public health information.
What are confounding factors and how do they affect studies?
|
