Question
How to use the Chi squared test?
?

Question
How to use the Chi squared test?
1. It's a goodness of fit. You compare a table
 i ... ... l j nij Lj ... ... c Ci 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?

Question
How to use the Chi squared test?
1. It's a goodness of fit. You compare a table
 i ... ... l j nij Lj ... ... c Ci 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?
If you want to change selection, open document below and click on "Move attachment"

#### pdf

owner: naxplast06 - (no access) - Deviant S. - The Practically Cheating Statistics Handbook (2010, CreateSpace Independent Publishing Platform).pdf, p150

status measured difficulty not learned 37% [default] 0