A doctor is concerned about the relationship between blood pressure and irregular heartbeats. Among her patients, she
Question:
A doctor is concerned about the relationship between blood pressure and irregular heartbeats. Among her patients, she classifies blood pressures as high, normal, or low, and heartbeats as regular or irregular and finds that (a) 15 % have high blood pressure: (b) 9 % have low blood pressure, (c) 20% have irregular heartbeats; (d) of those with an irregular heartbeat, 36 % have high blood pressure; and (e) of those with normal blood pressure, 9% have an irregular heartbeat. Suppose a patient is chosen at random.
(a) What is the probability the patient has a irregular heartbeat and normal blood pressure?
(b) What is the probability the patient has a irregular heartbeat and low blood pressure?
Applied Statistics for Public and Nonprofit Administration
ISBN: 978-1285737232
9th edition
Authors: Kenneth J. Meier, Jeffrey L. Brudney, John Bohte