Power Flashcards
1
Q
Type I Error
A
Rejecting the null hypothesis when there is not enough evidence
2
Q
Type II Error
A
Failing to reject the null hypothesis
3
Q
What does power measure?
A
A statistical test’s ability to detect deviations from the null hypothesis
4
Q
Evacuating when the dam does not fail is a _______ error.
A
Type I
5
Q
Not evacuating when the dam does fail is a _______ error.
A
Type II
6
Q
What 3 factors does the margin of error depend on?
A
- Significance level (alpha)
- Population standard deviation
- Sample size
7
Q
What 2 steps are used to calculate power?
A
- Write the event that the test rejects H0
- FInd probability of this event under the specified alternative
