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A researcher interested in finding a simple way to estimate intelligence decides to evaluate skull circumference as a possible indicator of intelligence. He finds that the size of an adult's skull remains the same from one measurementto the next, but he finds that skull circumference is not a very good predictor of intelligence. In this example, skull circumference as a measure of intelligence isAreliable and validBreliable but not validCvalid but not reliableDneither reliable nor validEhighly correlated with intelligence test scores
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