Week 10 Flashcards
1
Q
How to test if assumption of equal variances for 2 samples is just in 2 sample t test
A
If null variance_1 = variance_2 is true
Can do F test on variances
2
Q
Linear regression model α is?
A
Where x is explanatory/predictor y is response
3
Q
Linear regression model β is?
A
Where x is predictor/explanatory variable, y is response
4
Q
s_xx
A
5
Q
S_xy
A
6
Q
The point (Xbar,ybar) must lie on regression line because
A
7
Q
For a single explanatory variable, MLE for variance is
A
8
Q
Never give predictions that are
A
To more sig figs than the data we began with
9
Q
Limitation of simple linear model for single explanatory
A
Works for interpolation, not extrapolation
