4. Correlation Flashcards
1
Q
What is correlation?
A
The nature of the linear relationship between two variables
2
Q
What are the types of correlation?
A
Strong: clearly defined
Weak: general trend, not clear
Positive: as one increases, the other increases
Negative: as one increases, the other decreases
None
3
Q
What is the equation of the regression line?
A
y = a + b x
Can only be used to make predictions for values of y when given x
4
Q
What is extrapolation?
A
When a point is outside the range of data
