9 Correlation Flashcards
1
Q
What is R^2= Coeffeffecient of determination?
A
The proportion of variability in the dependent variable that can be explained by the independent variable.
2
Q
R is coefficient of correlation?
A
3
Q
Correlation
A
R and deals with direction of graph
4
Q
Regression
A
y = mx + b
5
Q
What is the regression formula?
A
6
Q
B1(large beta 1”) or the slope (m)
A
Regression coefficient
7
Q
Bo(large beta o) or the y int
A
Y axis intercept
8
Q
To test the significance of inference and the 3 assumptions?
A
9
Q
How can you show the test statistic for regression?
A
10
Q
What are the main conclusions of this session?
A
11
Q
How would you write the 95% confidence interval for the regression line y=mx+b?
A
b+-tcritical*SEb
Mean+-z*SE
12
Q
How would you test if the r correlation is significant?
A
13
Q
Degrees of freedom for simple linear regression?
A
