Answered: a.) Compute the Pearson Correlation…

Name: Identifying individuals with a high risk of Alzheimer’s disease usuall
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Description: 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 wheth

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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

a.) Compute the Pearson Correlation Coefficient for these data.

r =

b.) The correlation is

Group of answer choices

Medium and negative

Large and negative

Large and positive

Medium and positive

c.) The alternative hypothesis in words for a two-tailed test is

d.)If we use a two-tailed test with α = .01, the critical r values are:

Group of answer choices

±0.833

±0.874

±0.754

±0.669

e.)Your decision is:

-Reject the null hypothesis and conclude that there is a significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

-Fail to reject the null hypothesis and conclude that there is a significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

-Reject the null hypothesis and conclude that there is no significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

-Fail to reject the null hypothesis and conclude that there is no significant correlation between the scores on the 7-minute screen test and the scores on the cognitive series

f.) Report the results in APA

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