Chi | Chi-square degree of freedom
ObservedVariables:Definition[1]ContentsDefinitionsWhatisaChiSquareTest?[2]WhatisaChi-SquareStatistic?[3]ChiSquareP-Values.[4]TheChi-SquareDistribution&ChiDistribution[5]Calculations:HowtoCalculateaChi-SquareStatistic:[6]HowToTestaChiSquareHypothesis(withvideo)[7]Seealso:Watchthevideoforanoverviewofthetests:Can’tseethevideo?Clickhere[8].Therearetwotypesofchi-squaretests.Bothusethechi-squarestatisticanddistributionfordifferentpurposes:BacktoTop[9]Theformulaforthechi-squarestatisticusedinth...
Observed Variables: Definition[1]
ContentsDefinitions
What is a Chi Square Test?[2] What is a Chi-Square Statistic?[3] Chi Square P-Values.[4] The Chi-Square Distribution & Chi Distribution[5]Calculations:
How to Calculate a Chi-Square Statistic: [6] How To Test a Chi Square Hypothesis (with video)[7]See also:
Watch the video for an overview of the tests:
Can’t see the video? Click here[8].There are two types of chi-square tests. Both use the chi-square statistic and distribution for different purposes:
Back to Top[9]
The formula for the chi-square statistic used in the chi square test is:
The chi-square formula.The subscript “c” is the degrees of freedom[10]. “O” is your observed value[11] and E is your expected value[12]. It’s very rare that you’ll want to actually use this formula to find a critical chi-square value by hand. The summation symbol[13] means that you’ll have to perform a calculation for every single...