Statistical Analysis Regression - Correlation. Roderick Graham Fashion Institute of Technology. Conceptual Background.
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Fashion Institute of Technology
What’s up with this guy?
Can we suggest that there is a relationship between income and IQ?
Y – Axis for “Effect” Variable
X – Axis for “Cause” Variable
“Regression Line” Summarizes Relationship between X and Y
Because the line slowly rises, you can say that this is a positive relationship.
The closer the dots cluster around this line, the stronger the relationship between X and Y
The steeper the rise, the stronger is the relationship (X affects Y more)
Can we suggest that IQ causes an increase in income?
NO! Correlation never means causation!
We think that the number of children in a home influences the hours per week a husband spends on housework. Thus Number of Children = X and Hours Per Week = Y