A survey conducted five years ago by the health centre at a university showed that 18% of the students smoked at the time. This year a new survey was conducted on a random sample of 200 students from this university, and it was found that 40 of them smoke. a) State the population proportion. b) Determine the sample proportion for students who did not smoke. c) Do these data provide convincing evidence to suggest that the percentage of students who smoke has changed over the last five years
A survey conducted five years ago by the health centre at a university showed that 18% of the students smoked at the time. This year a new survey was conducted on a random sample of 200 students from this university, and it was found that 40 of them smoke. a) State the population proportion. b) Determine the sample proportion for students who did not smoke. c) Do these data provide convincing evidence to suggest that the percentage of students who smoke has changed over the last five years
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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A survey conducted five years ago by the health centre at a university showed that 18% of the
students smoked at the time. This year a new survey was conducted on a random sample of 200
students from this university, and it was found that 40 of them smoke.
a) State the population proportion.
b) Determine the sample proportion for students who did not smoke.
c) Do these data provide convincing evidence to suggest that the percentage of students who
smoke has changed over the last five years?
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