posted by jenna .
1. A recent study confirms that people who run regularly, live longer. How can one explain that?
2. More retired people die each year than those who have not retired. Does this mean that delaying retirement will increase one's life expectancy? Explain.
We do not do your homework for you. Although it might take more effort to do the work on your own, you will profit more from your effort. We will be happy to evaluate your work though.
However, it might help to consider the questions below.
1. Are runners more likely to avoid negative aspects for health, like obesity and smoking?
2. Are the ages equivalent? Is retirement chosen or forced?
For question #1, can you say that the two variables are positively correlated however, it doesn't mean that running regularly can cause one to lives longer.
For question #2, are you saying that there are other variables that need to be considered?
1. Correlation does not necessarily mean causation.
2. That's what I am saying. Same for 1.