Graduate Statistics

Question

Answer

Draw a scatterplot of each of the following:

· A strong positive correlation

· A strong negative correlation

· A weak positive correlation

· A weak negative correlation

Give a realistic example of each.

What is the meaning of the p value of a correlation coefficient?

Why is it important to know the amount of shared variance when interpreting both the significance and the meaningfulness of a correlation coefficient?

If a researcher wanted to predict how well a student might do in college, what variables do you think he or she might examine? What statistical procedure would he or she use?

What does the saying “correlation does not imply causation” mean?

How does determining a best-fitting line help us to predict from one variable to another?