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For one way analysis of the model, we directly use one way ANOVA test but for analyzing two way ANOVA we must be used GLM in SPSS because in two-way analysis random effects are mixed them that's why if we analyze GLM random effect also in analyze.
this in MIXED rather than GLM to allow for the nested random effect. Still use time (cut dates) as a random effect also as this is definitely important for what you want to see and is more likely to yield important information.
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