Quiz 4 Flashcards
1
Q
When do you use a z score? A t score?
A
Z score: when standard deviation is known
T score: when standard deviation is unknown
2
Q
What are the steps to find a CI?
A
1) find p-hat, q-hat, and n
2) use confidence level to find the critical value
3) find E
4) confidence interval is p-hat-E<p></p>
3
Q
What is a confidence level
A
How confident you are that the population parameter will be inside the interval
4
Q
What is a critical value
A
The number on the borderline separating sample statistics that are likely to occur from those that are unlikely
