L8 - small Confidence Interval. Flashcards
1
Q
what is considered a “ small sample”
A
a sample of 30 or less
2
Q
what is V (nu)
A
It represents degrees of freedom which is n-1
3
Q
What is the equation for small sample Confidence Interval
A
C.I = x̄ ± t v,a (s/n^-1)
4
Q
What are degrees of freedom?
A
n-1. where n is the number of variables. Eg. If you had a sample of 100 seats in a lecture hall 99 people get to choose where they want to sit.
