Goodness of Fit Flashcards
1
Q
What is the Observed/Expected Frequencies referring to?
A
The number of sample points expected to lie in a certain category
2
Q
What’s a measure to test the goodness of fit and what’s the variable?
A
X2 = Σ[(Oi-Ei)2/Ei]
3
Q
What’s an alternative form of the equation for goodness of fit? (X2)
A
X2 = Σ[Oi2/Ei] - N
where N is the number data measures in our sample
4
Q
What is Chi squared
A
It is a theoretical distribution of the difference between observed and expected values
5
Q
What do the expected values have to be greather than to be modelled with Chi Squared
A
Greater than 5
