10.44 JAMA study of heart patients. The Journal of the American
Medical Association (Apr. 18, 200 l ) published the results
AMI of a study of alcohol consumption in patients suffering
from acute myocardial infarction (AMI). The patients
were classified according to average number of alcoholic
drinks per week and whether or not they had congestive
heart failure. A summary of the results for 1,913 AMI
patients is shown in the table.
Alcohol Consumption
Congestive Less than 7
Drinks/Week
7 or More
Heart Failure Abstainers Drinks/Week
Yes
No
146
750
106
590
29
292
Totals 896 696 321
Source: Mukamal. K. J .. et al. “Prior alcohol consumption and mortality
following acute myocardial infarction, ” Joumal of rhe American Medical
Association, Vol. 285, No. 15. April 18. 2001 (Table 1).
a. Find the sample proportion of abstainers with congestive heart failure. . 163
b. Find the sample proportion of moderate drinkers
(patients who have less than 7 drinks per week) with
congestive heart failure . . 152
c. Find the sample proportion of heavy drinkers (patients
who have 7 or more drinks per week) with congestive
heart failure . . 090
d. Compare the sample proportions, parts a-c. Does it
appear that the proportion of AMI patients with congestive heart failure depends on alcohol consumption?
e. Give the null hypothesis for testing whether the proportion of AMI patients with congestive heart failure
depends on alcohol consumption.
f. Conduct the test, part e, using \ x = .05. What do you
conclude? ,_Y “- “10.20. reject H-:i
