A correlation of -1.0 means the researcher's hypothesis is in error.
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Q9: A theory should be consistent with known
Q10: A theory should be complex.
Q11: A measure needs to possess reliability, but
Q12: To test for temporal precedence, one should
Q13: Correlation is a measure of covariation.
Q15: If we have established temporal precedence and
Q16: Eliminating alternative explanations is more difficult in
Q17: A selection threat occurs when groups we
Q18: A history threat occurs when two groups
Q19: Random assignment is a viable solution to
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