Edited, memorised or added to reading queue

on 17-Sep-2018 (Mon)

Do you want BuboFlash to help you learning these things? Click here to log in or create user.

Flashcard 3316115705100

Question
How to use the Chi squared test?
Answer
1. It's a goodness of fit. You compare a table
i......l
jnij Lj
...
...
cCi n
To a table with eij being each cell's Lj×Ci÷n

Then
\(\chi^2=\sum_i^l\sum_j^c{(n_{ij}-e_{ij})^2\over e_{ij}}\)

OR if there is a eij <=5
\(\chi^2=\sum_i^l\sum_j^c{(|n_{ij}-e_{ij}|-.5)^2\over e_{ij}}\)

ie using the Yates correction

A right tail area < alpha rejects H0 , left tail < alpha means the fit is TOO GOOD.
Cheating in results?

statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill

pdf

cannot see any pdfs