Week 17 Flashcards
1
Q
Chi-squared test can be used for goodness of fit tests, but also for what?
A
Association tests (The independence of two or more variables on a single population)
2
Q
What is the formula for chi-squared?
A
X^2 = The sum of: (Obs - exp)^2 / exp
3
Q
What is the degrees of freedom; they are a critical factor in using the chi-square test.
A
Essentially the number of categories of observation - 1
4
Q
How to calculate degree of freedom for association tests?
A
(number of rows-1) x (number or columns-1
5
Q
A
