Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive tests. However, researchers have developed a 7-Minute Screen, which is a quick and easy way to accomplish the same goal. To assess if the 7-Minute Screen is as effective as the complete series of tests, a researcher administered both tests to a group of ten patients and got a correlation coefficient of 0.84. What percent of the variance of the cognitive scores is predicted from the 7-Minute Screen scores in the example above?

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