Unit 7 : Correlation And Regression Flashcards
1
Q
What are the possible values for r
A
-1 to 1 with 0 being no correlation
2
Q
What is a cofounder
A
A third variable that has correlation between two variables which are not directly linked
Causes a link between two variables
3
Q
General equation for regression line
A
Y = a + bx
4
Q
What’s the gradient in the regression equation
A
B
5
Q
What is interpolation
A
Estimate within data known, more reliable
6
Q
What is extrapolation
A
Estimate outside of data known, unreliable as dont know if trend continues outside of data
7
Q
What does PMCC stand for
A
Product moment correlation coefficient
8
Q
What is correlation
A
Strength of relationship between 2 variables
9
Q
A
11
Q
A
