Question

6. Identifying individuals with a high risk of Alzheimer's disease usually involves a long series of cognitivetests. However, researchers have developed a 7-minute Screen, which is a quick and easy way toaccomplish the same goal. The question is whether the 7-minute Screen is as effective as the completeseries of tests. To address this question, ljuin et al. (2008) administered both tests to a group of patients andcompared the results. The following data represent results similar to those obtained in the study.

a. Determine the linear correlation coefficient between the 7-Minute Screen and the Cognitive Series tests.Describe the relationship that seems to exist in terms of this problem. b. If an individual scores a 12 on the 7-Minute Screen, what would his or her predicted score be on the Cognitive Series tests?

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