Example Omnibus test

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1 example

1.1 anova
1.2 dependent variable: time minutes respond
1.3 test of homogeneity of variances
1.4 dependent variable: time minutes respond





example

a cellular survey on customers time-wait reviewed on 1,963 different customers during 7 days on each 1 of 20 in-sequential weeks. assuming none of customers called twice , none of them have customer relations among each other, 1 way anova run on spss find significant differences between days time-wait:


anova
dependent variable: time minutes respond

the omnibus f anova test results above indicate significant differences between days time-wait (p-value =0.000 < 0.05, α =0.05).


the other omnibus tested assumption of equality of variances, tested levene f test:


test of homogeneity of variances
dependent variable: time minutes respond

the results suggest equality of variances assumption can t made. in case tamhane’s test can made on post hoc comparisons.







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