Answered: Compute the pearson correlation…

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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(see problem attached)

Compute the pearson correlation coefficient of this data: r=

The correlation is:

Medium and negative

Large and negative

Large and positive

Medium and positive

The alternative hypothesis in words for a two-tailed test is:

The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is significant

The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is not significant

The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is less than zero

The correlation between the scores on the 7-minute screen test and the scores on the cognitive series is greater than zero

The null hypothesis in symbols for a two-tailed test is

H0: ρ = 0

H0: ρ ≠ 0

H0: r = 0

H0: r ≠ 0

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

±0.833

±0.874

±0.754

±0.669

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

Report the results in APA:

**Identifying Individuals at Risk for Alzheimer's: A Comparative Study**

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 |

**Explanation of the Table:**

- **Patient**: Represents each participant in the study, labeled from A to G.
- **7-Minute Screen**: The scores obtained from the quick 7-Minute screening test.
- **Cognitive Series**: The scores obtained from the complete series of cognitive tests.

The table compares the scores from the two testing methods, illustrating how results from the 7-Minute Screen align with those from a more comprehensive test series.

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