**Transcription for Educational Website:** **Q5.** Borer et al. [1980], studied 45 individuals after an acute myocardial infarction (heart attack). They measured the ejection fraction (EF); the EF is the percent of the blood pumped from the left ventricle (the pumping chamber of the heart) during a heartbeat. A low EF indicates damaged or dead heart muscle (myocardium). During follow-up, four patients died. Dividing EF into low (< 35%) and high (≥ 35%) EF groups produced the following table. | EF | Vital Status | | |------------|--------------|----------| | | Dead | Alive | | < 35% | 4 | 9 | | ≥ 35% | 0 | 32 | Is there reason to suspect, at a 0.05 significance level, that death is more likely in the low EF group? Use a one-sided p-value for your answer, since biological plausibility (and prior literature) indicates low EF is a risk factor for mortality.
**Transcription for Educational Website:** **Q5.** Borer et al. [1980], studied 45 individuals after an acute myocardial infarction (heart attack). They measured the ejection fraction (EF); the EF is the percent of the blood pumped from the left ventricle (the pumping chamber of the heart) during a heartbeat. A low EF indicates damaged or dead heart muscle (myocardium). During follow-up, four patients died. Dividing EF into low (< 35%) and high (≥ 35%) EF groups produced the following table. | EF | Vital Status | | |------------|--------------|----------| | | Dead | Alive | | < 35% | 4 | 9 | | ≥ 35% | 0 | 32 | Is there reason to suspect, at a 0.05 significance level, that death is more likely in the low EF group? Use a one-sided p-value for your answer, since biological plausibility (and prior literature) indicates low EF is a risk factor for mortality.
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
100%
![**Transcription for Educational Website:**
**Q5.**
Borer et al. [1980], studied 45 individuals after an acute myocardial infarction (heart attack). They measured the ejection fraction (EF); the EF is the percent of the blood pumped from the left ventricle (the pumping chamber of the heart) during a heartbeat. A low EF indicates damaged or dead heart muscle (myocardium). During follow-up, four patients died. Dividing EF into low (< 35%) and high (≥ 35%) EF groups produced the following table.
| EF | Vital Status | |
|------------|--------------|----------|
| | Dead | Alive |
| < 35% | 4 | 9 |
| ≥ 35% | 0 | 32 |
Is there reason to suspect, at a 0.05 significance level, that death is more likely in the low EF group? Use a one-sided p-value for your answer, since biological plausibility (and prior literature) indicates low EF is a risk factor for mortality.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6915687c-4f06-4661-ac02-aefc88931b4a%2Fb8f85516-0e50-4e63-8516-cb012c5fdc2f%2Fpvn4trp_processed.png&w=3840&q=75)
Transcribed Image Text:**Transcription for Educational Website:**
**Q5.**
Borer et al. [1980], studied 45 individuals after an acute myocardial infarction (heart attack). They measured the ejection fraction (EF); the EF is the percent of the blood pumped from the left ventricle (the pumping chamber of the heart) during a heartbeat. A low EF indicates damaged or dead heart muscle (myocardium). During follow-up, four patients died. Dividing EF into low (< 35%) and high (≥ 35%) EF groups produced the following table.
| EF | Vital Status | |
|------------|--------------|----------|
| | Dead | Alive |
| < 35% | 4 | 9 |
| ≥ 35% | 0 | 32 |
Is there reason to suspect, at a 0.05 significance level, that death is more likely in the low EF group? Use a one-sided p-value for your answer, since biological plausibility (and prior literature) indicates low EF is a risk factor for mortality.
Expert Solution
Step 1
Here, we use hypothesis testing:
Null hypothesis (H0) : p1 =p2
Alternate Hypothesis (Ha) : P1 >P2
Step by step
Solved in 3 steps with 2 images
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman