Introduction to the chi-square test for homogeneity | AP Statistics | Khan Academy

Introduction to the chi-square test for homogeneity.

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[karannchew]

Note for future revision.

Two Different groups.

Test of homogeneity = Test whether the Distribution of those groups for certain variable are similar or not.

= Test whether the elements in the two groups are from the same population.

= Test whether a var in both groups varies in similar way or not. If yes, then the elements in the groups are similar (and are from the same population).

Ho = No difference in subject preference for left-hand and right-hand groups.

Steps are exactly the same as test of independence. But in test of independence, we test whether two variables (left/right-handed and subject preference) affect each other.

[shahrokhabbasirad]

is there any tool for measuring the spatial homogeneity of one group of data?

[jeffreymasicap]

sir are test of independence and test of homogeneity are same? or not.. because as far as i concern for you to able to reject null hypothesis the X^2 or the chi square must be greater to your alpha?

[GouravBanerjee]

Sorry, don't we fail to reject the null hypothesis if the value is less than the critical value (5.991 assuming alpha=.05, df=2)? The Chi sq should be larger, isn't it?

[sudiptasaha]

Sir, are "test of homogeneity" and "test of independence" are same? Or these are same in case of two random variables??

[xsean]

i had a hard time understanding this, our professor give us other formula to solve homogeneity.. your formula there was the same with test of goodness-of-fit... idk anymore..

[flower_girl]

Why can't u just upload something very simple n step by step 😔 and maybe use an easier example