Chi-Squared Goodness of Fit - Introduction

Video Resources:  Chi-Squared Goodness of Fit Test

A useful statistical test is the Chi-Squared  Goodness  of  Fit  Test.   The Chi-Squared distribution is NOT symmetrical -- it is skewed right -- and the test is always a right-tail test. The shape depends on the degrees of freedom (here shown as k).

Chi-square_pdf.svg Download Chi-square_pdf.svg   

 Here  is  a 24-minute  video,  if  you  need  a "refresher."CHI-SQUARED GOODNESS-OF-FIT   (Links to an external site.)

 

Here is an 8-minute guide to doing these tests on the TI-84 and TI-83 calculator. (Links to an external site.)

Here is a Chi-Squared Distribution Table.  You can also find one in the e-text.