Hello all, we covered lots of material this week. Following is a list of the material we covered;
1.) The three ways 2 variables can be related;
Unrelated
Linear
Nonlinear
2.) Correlations
r values indicate direction and strength
rules of thumb for strengths
determining if the correlation is significant
no causation with correlations
3.) Spurious relationships
4.) Two purposes of inferential statistics (estimation and significance testing)
5.) Kurtosis and Skewness
6.) Standard error of the mean
7.) Confidence Level and Confidence Interval
8.) Significance testing of the null hypothesis
9.) Type I & II errors
Question for thought:
In class, we discussed spurious relationships. For discussion, come up with your own. Describe a relationship that appears to exist between two variables and then describe a third variable that really explains the relationship.
