## Question

# In Exercises 29 and 30, find the probabilities and indicate when the 5% guideline for cumbersome calculations is used. 29. Medical Helicopters In a study

In Exercises 29 and 30, find the probabilities and indicate when the "5% guideline for cumbersome calculations" is used.

29. Medical Helicopters In a study of helicopter usage and patient survival, results were obtained from 47,637 patients transported by helicopter and 111,874 patients transported by ground (based on data from "Association Between Helicopter vs Ground Emergency Medical Services and Survival for Adults with Major Trauma," by Galvagno et al., Journal of the American Medical Association, Vol. 307, No. 15).

- If 1 of the 159,511 patients in the study is randomly selected, what is the probability that the subject was transported by helicopter?
- If 5 of the subjects in the study are randomly selected without replacement, what is the probability that all of them were transported by helicopter?

30. Medical Helicopters In the same study cited in the preceding exercise, among the 47,637 patients transported by helicopter, 188 of them left the treatment center against medical advice, and the other 47,449 did not leave against medical advice. If 40 of the subjects transported by helicopter are randomly selected without replacement, what is the probability that none of them left the treatment center against medical advice?

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Exercise 29 Part 1 Probability that the subject was transported by helicopter 1 Total number of patients Patients transported by helicopter 47637 Pati...### Get Instant Access to Expert-Tailored Solutions

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