Which of the following is not an assumption for computing a twoway betweensubjects ANOVA?
The population being sampled from is normally distributed. 

Participants were selected using a random procedure. 

One observation has no effect on the likelihood of another observation. 

There is homogeneity of variance and homogeneity of covariance. 
The following is not a required assumption for computing a twoway betweensubjects ANOVA:
One observation has no effect on the likelihood of another observation.
All the remaining assumptions are required for computing a twoway betweensubjects ANOVA  populations should be normal, random and there should be homogeneity of variance and homogeneity of covariance. Only the above assumption is not required.
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