Confidence intervals Flashcards
1
Q
What is a CI?
A
Likelihood a population mean lies within certain boundaries
2
Q
Calculate lower bound
A
mean - (1.96 x SE)
3
Q
Calculate upper bound
A
mean + (1.96 x SE)
4
Q
If there are more than 30 ppts which table do you use? CI
A
Z tables
5
Q
If there are less than 30 ppts which table do you use? CI
A
T tables
6
Q
How large should a CI be?
A
Smaller is better as more informative
