mandyO1

06.11.2020 • 

Mathematics

Q waves on the electrocardiogram, according to Schinkel et al. (A-15), are often considered to be reflective of irreversibly scarred myocardium. These researchers assert, however, that there are some indications that residual viable tissue may be present in Q-wave-infarcted regions. Their study of 150 patients with chronic electrocardiographic Q-wave infarction found 202 dysfunctional Q-wave regions. With dobutamine stress echocardiography (DSE), they noted that 118 of these 202 regions were viable with information from the DSE testing. Construct a 90 percent confidence interval for the proportion of viable regions that one might expect to find a population of dysfunc�tional Q-wave regions.

Ответ:

kayranicole1

14.03.2020

Mathematics

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A rational number is a real number which is not an integer and is written as the ratio of two numbers, hence a simple fraction. When a rational number is multiplied to another rational number, the product is still a rational number. Hence the answer to this problem is D. a fraction.

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