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. How do you interpret this coefficient?
a.
There is a strong positive association between these tests.
b.
There is a negative association between these tests.
c.
There is a significant association between these tests.
d.
There is no association between these tests.