Answer:
The case represented a failure for the NAACP because it supported a law that limited the voting rights of formerly enslaved individuals.
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Answer:
In simple words, Representative surveys are valuable because they mean that the questionnaire contains all different categories of individuals and also that the correct blend of individuals is questioned. Your results will be skewed if your study isn't representative. The poll's inconsistency was due to an unbalanced, non-representative sample.
The Navajo people still use sand paintings and blessingways in religious traditions.