Exam 4 Prep Flashcards
If the alternative hypo. states that it is less than the null hypo, what do you call this type of alternative hypo?
A left tail.
If the alternative hypo. states that it is more than the null hypo, what do you call this type of alternative hypo?
A right tail
If the alternative hypo. is just “different” than the null hypo, what do you call this type of alternative hypo?
A two-tail.
What does the alpha symbol stand for in hypothesis testing?
Significance level
What is the p-value?
The probability of getting sample data
What are the only two decisions when doing hypothesis testing?
To reject or not to reject.
For a p-value of 0.03, where would we reject Ho (what alpha level)?
Where would you not reject it?
alpha= 0.05
alpha=0.01
What is p-hat?
The statistic that estimates the proportion parameter p.
What does the critical value respond to?
the alpha level.
What does the p-value correspond with?
The test statistic
Do you use a t-test or a z-test when hypo. testing for a proportion?
A z-test.
What is a proportion?
A fraction of the total.
Do you use a t-test or a z-test when hypo testing when sigma is unknown?
A t-test.
What must you do when performing a two-tailed hypo. test?
To obtain the p-value, you must double the probability within the test stat. tail.
What is a type 1 error?
What is a type 2 error?
Rejecting Ho when Ho is correct.
Not rejecting Ho when Ho is not correct.
