Question: What pattern in grouped data would make SS within = 0? What pattern within data would make SS between = 0? Assuming that a researcher

What pattern in grouped data would make SS_within = 0? What pattern within data would make SS_between = 0?

Assuming that a researcher hopes to demonstrate that a treatment or group membership variable makes a significant difference in outcomes, which term does the researcher hope will be larger, MS_betweenor MS_within? Why?

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