8: Variables Flashcards
1
Q
r
A
Pearson’s r — correlation coefficient
2
Q
ρ
A
Rho — population correlation
3
Q
t
A
Test statistic
4
Q
df
A
Degrees of freedom — (n-2) or (n-k) — regressive df
5
Q
X
A
Any independent variable
6
Q
Y
A
Any dependent variable
7
Q
ŷ
A
Y hat — estimated y value of a x value
8
Q
a
A
Y intercept
9
Q
b
A
Slope
10
Q
X
A
Any value of an independent variable
11
Q
ȳ
A
Mean of y — the dependent variable
12
Q
x̅
A
Mean of x — independent variable
13
Q
β
A
Beta — population slope for regression equation
14
Q
b
A
Estimate of regression line’s slope from sample info
15
Q
Sb
A
Standard error of slope estimate
