Question: Many diagnostic tests are indicative of problems only if a child scores in the upper 10 percent of those taking the test (at or above

Many diagnostic tests are indicative of problems only if a child scores in the upper 10 percent of those taking the test (at or above the 90th percentile). Many of these tests are scaled to produce T scores, with a mean of 50 and a standard deviation of 10. What would be the diagnostically meaningful cutoff?

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