Final Exam Flashcards
1
Q
What does confidence LEVEL tell us?
A
% of intervals that will contain the true mean
2
Q
What’s the other name for r? What does it measure?
A
Correlation Coefficient; magnitude: how strong data fits a line
3
Q
What about spread of data must be true for a SLR model to work?
A
Distance from the line must be constant
4
Q
What does variance actually measure?
A
Distance of values from the mean
5
Q
What does the Margin of Error account for?
A
Sampling variability
6
Q
When is it ok to find a 95% confidence interval instead of conducting an 𝛼 = 0.05 level hypothesis
test?
A
For any hypothesis test with a two-sided alternative hypothesis.
7
Q
What’s a confounding variable?
A
An outside variable that may impact the results
