Question

In: Statistics and Probability

Identifying individuals with a high risk of Alzheimer’s disease usually involves a long series of cognitive...

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. The question is whether the 7-Minute Screen is as effective as the complete series of tests. To address this question, Ijuin et al. (2008) administered both tests to a group of patients and compared the results. The following data represent results similar to those obtained in the study.

Patient

7-Minute Screen

Cognitive Series

A

3

7

B

7

15

C

4

14

D

5

13

E

7

9

F

5

15

G

11

25

Compute the Pearson Correlation Coefficient for these data.

r =

The correlation is:
A. medium and negative

B. Large and negative

C. Large and positive

D. Medium and positive

What is the alternate hypothesis in words?

Solutions

Expert Solution

The detailed solution is given in the pictures below.

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orchestra answered 2 years ago
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