How many of the 3005 subjects used at least one prescription medication? Construct a 90% confidence interval estimate of the percentage of adults aged 57 through years who use at least one prescription medication.

How many of the 3005 subjects used at least one prescription medication? Construct a 90% confidence interval estimate of the percentage of adults aged 57 through years who use at least one prescription medication.

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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22. Medication Usage In a survey of 3005 adults aged 57 through 85 years, it was found
that 81.7% of them used at least one prescription medication (based on data from “Use
of Prescription and Over-the-Counter Medications and Dietary Supplements Among Older
Adults in the United States," by Qato et al., Journal of the American Medical Association,
Vol. 300, No. 24).
a. How many of the 3005 subjects used at least one prescription medication?
b. Construct a 90% confidence interval estimate of the percentage of adults aged 57 through
85 years who use at least one prescription medication.
c. What do the results tell us about the proportion of college students who use at least one pre-
scription medication?

Critical Thinking. In Exercises 17–28, use the data and confidence level to construct a
confidence interval estimate of p, then address the given question.

Expert Solution

Step 1

p=0.817 = probability of subject use at least one prescription

n = 3005 = number of adults involved in survey

x= number of adults who take at least one subscription

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